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Robocopy File Transfer is it suppose to take 24 Hours?


Question

Hello

Started this Robocopy file transfer last night of a folder on This Desktop to 256GB USB 3.2 Gen 1 Flash drive---Still transferring at this time even,  is that normal?    first time ever using Robocopy, previously just used WIndows 11 File Transfer Dialog and let it go for 24-48 hours when i updated this little flash drive,  but decided to try Robocopy, but still seems slow to me

Only security on system is Windows Defender, and Malwarebytes Premium

I guess this little Sandisk flash drive is good,  would take a heck of a long time to fully test it, but i can if need be

 

Transferring Bunch of Small Purchased Music Files--108GB worth

WIth Windows File transfer was moving at 3.42MB/s or lower

Robocopy not sure if it was really any faster lol, as its still not done, and started this at 6:30PM last night

Flash drive is Sandisk Dual USB 3.2 Gen 1 A & C (For Laptop use)   

Purchased From Amazon arond February 21st

 

Edited by bikeman25

21 answers to this question

Recommended Posts

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What command did you use? You can set the number of threads using the /mt parameter.

Even with all the overhead of transferring a bunch of files, that seems excessively slow.

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Here is the Command i used

 "F:\Music Backup"/S /E /Z /ZB /R:5 /W:5 /TBD /NP /V /MT:16

And yes it does seem slow to me, thought would be a little faster this way, but i guess not lol, unless i entered something wrong with the command or this Sandisk flash drive stinks, or usb 3.0 hub adds extra slowness

 

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Ok Then will try that

As this Powershell Robocopy keeps going around and around,  it looked earlier like it was on last directory in the folder, and then restarted again.    

don't see option to cancel it,  so i guess my options are let  it continue, or maybe restart system if it keeps going around and around,  i swear i seen this directory in the list earlier 

Been going since 6:30PM Last night lol

 

This drive is Sandisk Duo USB A/C dual drive 256GB,  Purchased February 21st For my birthday to keep copy of the Purchased Music Folder,  Size of that Group 108GB after combining all Former Xbox/Groove Music Purchases when i had Windows Phone years ago/plus the 30 free albums back then (yes i grabbed them all lol) 

Plus Music Bought from Amazon over the years

First time ever used Robocopy method lol, thought by morning it would've been done today lol

 

 

Edited by bikeman25
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Hello,

Some thoughts, in no particular order:

  • The USB flash drive's DRAM cache could be exhausted, meaning that slower NAND Flash RAM dies are being written to directly, instead of being buffered through the cache.
  • The USB flash drive might be running hot as a result of the continuous, sustained writes, resulting in it slowing down to prevent any sort of thermal damage from occurring.
  • Hardware issue with the USB flash drive
  • File system corruption issue with the USB flash drive

In instances of #2, where I noticed a USB flash drive was getting hot, I put the drive into one of my dishwashing gloves, then put the  drive in the center of an ice-filled cup.  This seemed to cool things down enough to let copies work at expected speeds.

Regards,

Aryeh Goretsky
 

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On 18/09/2023 at 23:37, bikeman25 said:

Here is the Command i used

 "F:\Music Backup"/S /E /Z /ZB /R:5 /W:5 /TBD /NP /V /MT:16

And yes it does seem slow to me, thought would be a little faster this way, but i guess not lol, unless i entered something wrong with the command or this Sandisk flash drive stinks, or usb 3.0 hub adds extra slowness

 

I think your Robocopy command is a little more complex than it needs to be. If you're just doing a straight 1:1 copy from destination to source then do something like

robocopy <source> <destination> /MIR /R:1 W:1 /NP /MT:x /LOG:<path to a log files>

change 'x' in /MT to a suitable threads for your CPU.

 

Also as already stated your USB might be the limiting factor or the source drive your copying from.

 

 

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Yeah Source Drive is Western Digital 4TB Black Hard drive

Destination Disk is or was suppose to be Sandisk 256GB Flash drive (wanted extra backup copy of the Important Music files on that flash drive, but its very very slow to copy to either one of the Flash drives thus far--i gave up trying to get the files on it for now, but i may try again maybe later tonight and see how it does with this updated RoboCopy command that is less complex, maybe i'll have better luck 

 

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just because your stick is 3.2 doesn't mean what your plugging it into is that..  Did you ever do the benchmark on the stick?

I just looked in my draw and pulled out a 3.1 32GB stick and ran a winsat on it..  What is your disk showing?

C:\Windows\system32>winsat disk -drive h
Windows System Assessment Tool
> Running: Feature Enumeration ''
> Run Time 00:00:00.00
> Running: Storage Assessment '-drive h -ran -read'
> Run Time 00:00:01.09
> Running: Storage Assessment '-drive h -seq -read'
> Run Time 00:00:01.69
> Running: Storage Assessment '-drive h -seq -write'
> Run Time 00:01:15.64
> Running: Storage Assessment '-drive h -flush -seq'
> Run Time 00:00:14.86
> Running: Storage Assessment '-drive h -flush -ran'
> Run Time 00:00:12.45
> Dshow Video Encode Time                      0.00000 s
> Dshow Video Decode Time                      0.00000 s
> Media Foundation Decode Time                 0.00000 s
> Disk  Random 16.0 Read                       27.14 MB/s          6.1
> Disk  Sequential 64.0 Read                   112.99 MB/s          6.8
> Disk  Sequential 64.0 Write                  50.26 MB/s          5.3
> Average Read Time with Sequential Writes     7.050 ms          5.3
> Latency: 95th Percentile                     5.068 ms          6.6
> Latency: Maximum                             5345.888 ms          1.5
> Average Read Time with Random Writes         5.835 ms          5.7
> Total Run Time 00:01:46.02

C:\Windows\system32>

So to simulate what your doing, since I only have 32GB stick, and want it to finish quicker I copied over 13.5 worth of music to it.. This is what I got using this robocopy

robocopy c:\test\music h:\ /mir /R:1 /W:1 /NP /MT

              Total    Copied   Skipped  Mismatch    FAILED    Extras   
   Dirs :       130       130         1         0         0         6   
  Files :      1407      1407         0         0         0         9   
  Bytes :  13.576 g  13.576 g         0         0         0   732.2 k   
  Times :   7:55:07   0:47:34                       0:00:00   0:06:03   
                                                                        
                                                                        
  Speed :             5106509 Bytes/sec.                                
  Speed :             292.196 MegaBytes/min.                            
  Ended : Tuesday, December 5, 2023 5:11:40 PM                          

So what 47 minutes to copy over 1407 files in 130 different dir for 13.5GB.. Can see the speed worked out to about 5MBps - so even if you were seeing that speed.. 108GB should take you what approx. about 6 hours..

So you got something wrong, either in reading your files or writing to your stick.. Or you getting some really bad speed writing too it..

I think the /MT can mess with the times that it shows.. I believe /mt without calling out specific number defaults to 8, but that might of changed haven't used robocopy in years.  So 47:34 is close but by clock, I know I started this at 4:18 and finished at 5:11:40 so that works to like 53 minutes total..

robocopy c:\test\music h:\ /mir /R:1 /W:1 /NP /MT

-------------------------------------------------------------------------------
   ROBOCOPY     ::     Robust File Copy for Windows
-------------------------------------------------------------------------------

  Started : Tuesday, December 5, 2023 4:18:02 PM
   Source : c:\test\music\
     Dest = h:\

    Files : *.*

  Options : *.* /S /E /DCOPY:DA /COPY:DAT /PURGE /MIR /NP /MT:8 /R:1 /W:1

 

  • 0

Haven't benchmarked the stick yet, but i can shortly here

 

My Folder of the Music is stored on the 4TB Storage Drive--WD Black 4TB 

Windows 11 Pro clean installed less than 2 weeks ago, so gonna try the stick asap here again, and benchmark it to see what i get as soon as possible here

Hopefully some good results


USB Ports on the Rear of the PC is USB 3.2 Gen 1 i believe

Eventually i may get brave enough and invest in a Total SSD System, and just use the 4TB WD Black Drive as Extra External backup.   but as of right now still may main storage drive

 

*Though haven't run chkdsk on the 4TB Drive in ages, but i assume it should be fine i think lol*   

 

Edited by bikeman25
More Info
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Results of Winsat on the Flash drive

C:\Windows\System32>winsat disk -drive f
Windows System Assessment Tool
> Running: Feature Enumeration ''
> Run Time 00:00:00.00
> Running: Storage Assessment '-drive f -ran -read'
> Run Time 00:00:01.44
> Running: Storage Assessment '-drive f -seq -read'
> Run Time 00:00:04.61
> Running: Storage Assessment '-drive f -seq -write'
> Run Time 00:13:25.05
> Running: Storage Assessment '-drive f -flush -seq'
> Run Time 00:00:56.25
> Running: Storage Assessment '-drive f -flush -ran'
> Run Time 00:00:54.22
> Dshow Video Encode Time                      0.00000 s
> Dshow Video Decode Time                      0.00000 s
> Media Foundation Decode Time                 0.00000 s
> Disk  Random 16.0 Read                       16.65 MB/s          5.8
> Disk  Sequential 64.0 Read                   104.74 MB/s          6.6
> Disk  Sequential 64.0 Write                  0.64 MB/s          2.1
> Average Read Time with Sequential Writes     26.628 ms          1.9
> Latency: 95th Percentile                     67.113 ms          1.9
> Latency: Maximum                             300.513 ms          6.9
> Average Read Time with Random Writes         25.919 ms          1.9
> Total Run Time 00:15:22.06

 

  • 0

You can try without the hub, and check for newer USB controller drivers or drive firmwares if there are any available.  That's a bit strange.

Could just be overheated in some instances.  I generally prefer SSDs to flash media for large transfers but interesting.

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Second Sandisk 256GB Flash Drive Results

Sandisk dual USB A on one side, and USB C on other side drive

 

C:\Windows\System32>winsat disk -drive f
Windows System Assessment Tool
> Running: Feature Enumeration ''
> Run Time 00:00:00.00
> Running: Storage Assessment '-drive f -ran -read'
> Run Time 00:00:01.27
> Running: Storage Assessment '-drive f -seq -read'
> Run Time 00:00:05.03
> Running: Storage Assessment '-drive f -seq -write'
> Run Time 00:03:06.38
> Running: Storage Assessment '-drive f -flush -seq'
> Run Time 00:00:34.59
> Running: Storage Assessment '-drive f -flush -ran'
> Run Time 00:00:53.28
> Dshow Video Encode Time                      0.00000 s
> Dshow Video Decode Time                      0.00000 s
> Media Foundation Decode Time                 0.00000 s
> Disk  Random 16.0 Read                       15.56 MB/s          5.7
> Disk  Sequential 64.0 Read                   88.31 MB/s          6.3
> Disk  Sequential 64.0 Write                  3.29 MB/s          2.3
> Average Read Time with Sequential Writes     16.173 ms          3.2
> Latency: 95th Percentile                     42.170 ms          1.9
> Latency: Maximum                             6020.096 ms          1.4
> Average Read Time with Random Writes         25.412 ms          1.9
> Total Run Time 00:04:42.02

 

Both have terrible write speed though for some reason,  i may have to invest at some point in a Solid State Based External for first time--other external drives have i'll list below this comment

Western Digital Elements 500GB Desktop (2003) (First External, USB 2.0)

Western Digital Passport 2TB Ultra (Blue)

Western Digital Passport 2TB (RED)

Seagate 1TB   Portable USB 3.0

Western Digital in Enclosure 1TB WD Black in Ugreen USB 3.2 Gen 1 enclosure

Seagate 8TB  in Sabrent Enclosure  **Won this Drive  a CES Twitter Contest January 2019**   Originally the 4TB WD Black was gonna be the Backup Drive,   this was Primary til last year when i received Western Digital My Book 8TB to Become Primary, as Seagate 8TB turned out to be SMR Drive* 

Western Digital 8TB My Book (Primary Backup drive) 

*Note Sabrent USB Hub was cheap when i bought it,  gonna try at Christmas to afford a better one hopefully,   right now it doesn't function too well even though Powered USB Hub if i attempt to run 2 of the Externals with there own Power or even the bus powered Passport drives at same time*    

 

Internally on Desktop have the following

Samsung 970 Evo Plus 500GB Boot NvMe  *almost bought a Western Digital NvMe,  but decided in Christmas of 2020 to go for the Samsung instead--my first Non Western Digital,  my Previous AMD based FX 8310 system i had Western Digital Blue Sata 250GB Boot Drive, but then i only stored WIndows and a few small programs, and made sure rest of files was stored on another drive)   

Samsung 860 Evo 1TB Game SSD

Western Digital WD Black 4TB Storage drive

 

I just recently clean installed Windows 11 Pro x64 bit on this Desktop,  far as i know drivers are up to date as can be i think lol.        So maybe just bad luck on those drive purchases i suppose

 

Edited by bikeman25
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Yeah those speeds blow!! something is not right.. Wasn't there some issue with san disks from a while back? I remember some hubub about them but didn't pay it much mind because I don't have any..  Most of the ones I have bought in recent years have been SP ( Silicon Power).. But yeah with those write speeds no wonder it not finishing.

I knew there was some issues with san disks..

https://arstechnica.com/gadgets/2023/08/sandisk-extreme-ssds-are-worthless-multiple-lawsuits-against-wd-say/

But that is about SSD disks, not usb sticks from quick read over.

So you have any other sticks you could try winsat on?

edit: or do you have another machine you could test these in, even if not 3.2 usb port.

 

 

 

 

  • 0

Do have a Secondary Gaming Laptop i can test these 2 Drives on

(Laptop has USB 3.0 ports) don't think it's Gen 2 or 1 on that machine, and 1 USB C port)

Laptop is HP Omen 15_ce019dx (purchased December 2017 )

I have another 128GB Sandisk i think it is (Really gotta stop buying Sandisk Flash drives lol)  and another 64GB Western Digital branded one,   1 Corasir 16GB i believe, and 

Will post the results once i finish the testing of those on other PC asap here

**These drives was both tested with a Rear USB 3.2 Gen 1 Port,  USB Hub was not used at all during this**  1 at a time, and nothing else was connected over to the system at all during that time**  

 

Same Flash Drive Sandisk Dual  USB A and C on one--Tested on PC 2 Gaming Laptop

Microsoft Windows [Version 10.0.19045.3758]
(c) Microsoft Corporation. All rights reserved.

C:\Windows\system32>winsat disk -drive E
Windows System Assessment Tool
> Running: Feature Enumeration ''
> Run Time 00:00:00.00
> Running: Storage Assessment '-drive E -ran -read'
> Run Time 00:00:01.47
> Running: Storage Assessment '-drive E -seq -read'
> Run Time 00:00:05.77
> Running: Storage Assessment '-drive E -seq -write'
> Run Time 00:06:48.30
> Running: Storage Assessment '-drive E -flush -seq'
> Run Time 00:00:28.55
> Running: Storage Assessment '-drive E -flush -ran'
> Run Time 00:01:16.33
> Dshow Video Encode Time                      0.00000 s
> Dshow Video Decode Time                      0.00000 s
> Media Foundation Decode Time                 0.00000 s
> Disk  Random 16.0 Read                       14.29 MB/s          5.6
> Disk  Sequential 64.0 Read                   83.10 MB/s          6.2
> Disk  Sequential 64.0 Write                  1.54 MB/s          2.1
> Average Read Time with Sequential Writes     13.563 ms          3.7
> Latency: 95th Percentile                     138.841 ms          1.9
> Latency: Maximum                             644.054 ms          1.9
> Average Read Time with Random Writes         36.800 ms          1.9
> Total Run Time 00:08:41.27

C:\Windows\system32>

Edited by bikeman25
  • 0

So if you go here https://ssd-tester.com/

That drive doesn't benchmark very well.. But better than what your seeing..

if your looking for something that is fast for write - might be a good place to look.

As another example - I took one of my old 512GB nmve sticks that I Put in a case and these are the benchmarks. Same usb-c port that the usb stick used.. What a difference ;) less than a minute for the same 13.5GB of data..  My CD drive bench is below as well.

-------------------------------------------------------------------------------
   ROBOCOPY     ::     Robust File Copy for Windows
-------------------------------------------------------------------------------

  Started : Wednesday, December 6, 2023 9:56:01 PM
   Source : c:\test\music\
     Dest : h:\

    Files : *.*

  Options : *.* /S /E /DCOPY:DA /COPY:DAT /PURGE /MIR /NP /MT:8 /R:1 /W:1

------------------------------------------------------------------------------

               Total    Copied   Skipped  Mismatch    FAILED    Extras
    Dirs :       130       130         1         0         0         1
   Files :      1407      1407         0         0         0         0
   Bytes :  13.576 g  13.576 g         0         0         0         0
   Times :   0:06:07   0:00:36                       0:00:00   0:00:04


   Speed :           399097747 Bytes/sec.
   Speed :           22836.556 MegaBytes/min.
   Ended : Wednesday, December 6, 2023 9:56:42 PM

Here is the winsat on it

C:\Windows\system32>winsat disk -drive h
Windows System Assessment Tool
> Running: Feature Enumeration ''
> Run Time 00:00:00.00
> Running: Storage Assessment '-drive h -ran -read'
> Run Time 00:00:00.55
> Running: Storage Assessment '-drive h -seq -read'
> Run Time 00:00:02.59
> Running: Storage Assessment '-drive h -seq -write'
> Run Time 00:00:02.33
> Running: Storage Assessment '-drive h -flush -seq'
> Run Time 00:00:00.63
> Running: Storage Assessment '-drive h -flush -ran'
> Run Time 00:00:00.61
> Dshow Video Encode Time                      0.00000 s
> Dshow Video Decode Time                      0.00000 s
> Media Foundation Decode Time                 0.00000 s
> Disk  Random 16.0 Read                       198.76 MB/s          7.7
> Disk  Sequential 64.0 Read                   375.55 MB/s          8.0
> Disk  Sequential 64.0 Write                  390.00 MB/s          8.0
> Average Read Time with Sequential Writes     0.217 ms          8.6
> Latency: 95th Percentile                     0.508 ms          8.7
> Latency: Maximum                             1.282 ms          8.9
> Average Read Time with Random Writes         0.211 ms          8.9
> Total Run Time 00:00:06.83

C:\Windows\system32>
C:\Windows\system32>winsat disk -drive C
Windows System Assessment Tool
> Running: Feature Enumeration ''
> Run Time 00:00:00.00
> Running: Storage Assessment '-drive C -ran -read'
> Run Time 00:00:00.14
> Running: Storage Assessment '-drive C -seq -read'
> Run Time 00:00:02.14
> Running: Storage Assessment '-drive C -seq -write'
> Run Time 00:00:01.61
> Running: Storage Assessment '-drive C -flush -seq'
> Run Time 00:00:00.33
> Running: Storage Assessment '-drive C -flush -ran'
> Run Time 00:00:00.34
> Dshow Video Encode Time                      0.00000 s
> Dshow Video Decode Time                      0.00000 s
> Media Foundation Decode Time                 0.00000 s
> Disk  Random 16.0 Read                       807.28 MB/s          8.6
> Disk  Sequential 64.0 Read                   876.08 MB/s          8.4
> Disk  Sequential 64.0 Write                  835.89 MB/s          8.3
> Average Read Time with Sequential Writes     0.074 ms          8.9
> Latency: 95th Percentile                     0.150 ms          8.9
> Latency: Maximum                             0.324 ms          8.9
> Average Read Time with Random Writes         0.065 ms          8.9
> Total Run Time 00:00:04.66

C:\Windows\system32>

If your goal is backup and "fast" prob wouldn't use usb sticks.. But even the 3.1 usb interface seems to be pretty fast..  That benchmark site listed to shows a few really fast sticks..

  • 0

Yeah my goal is kinda fast backup and yeah think time to get away from USB Sticks

Much better than what I've been seeing for sure

I'll get it all sorted in due time etiher for Christmas or Birthday in February,   as  if i tried to backup even a Smallish directory with these usb sticks i'd be waiting for a while i imagine lol.        The one time i did a direct File copy,  started at  11pm, and didn't finish til 11am next day lol

 

Of Course my Samsung 970 Evo Plus 500GB M.2 NvMe was silently replaced in August 2021 with a newer version, with a newer Controller---(this ones has had no firmwire updates at all--Old Phoenix controller on this one)  Debated if i was worth replacing or not, then i decided well probably not lol

 

So kinda will look into something a wee faster, doesn't have to be lightning speed really, just enough to properly backup the data.     Do have a Cloud Copy of the Purchased Music Folder which contains former XBox/Groove Music Free albums i got when had WIndows Phone back in 2014-2015 time frame (don't think those are replaceable hence why i got multiple backups on several drives as well lol)  Amazon bought songs,  Older CD Rips from many years ago lol,  

Edited by bikeman25
More Info
  • 0

Of Course in June 2020 This Motherboard was the Cheapest 10th Gen Compatible board my local PC shop had available in order to upgrade to Intel 10th Gen  10700 CPU go along with my new case and Video card at the time

I gotta benchmark my WD My Passport Red 2TB drive

either my USB 3.2 Gen 1 hub is slow as molasses--plan on purchasing a better usb hub with Christmas Gift card, and hopefully improves drive speed a little bit 

*Why Heck do the Power USB hub lose communication with a Powered USB Enclosure with WD 1TB Drive inside it, and therefore have to redo transfer of updated Folder to WD My Passport Drive*  This happens all the time whenever i attempt to use 2 Devices even with the Hub sighs

 

*When i upgrade to either 14th Gen in the Future or 15th Gen Intel or Maybe back to AMD in future,  not cheaping out on following items-- Motherboard,  CPU getting decent one, that i can hopefully still cool with air Cooling,  very nervous on AIOs leaking lol still.

And if go with Intel Processor again, then Nvidia video card,  if go with AMD for first time since AMD FX  then AMD video card (thats way i always been lol)     

 Upgrading Power Supply with a Real Good Quality one (may do that prior to next system refresh, maybe even for Birthday in February lol--Current Power Supply EVGA G3 650 Watt been in use since February 2018, of course back then i had more room to work on my Computers--since moved since then and less room and more family annoying me whenever i'm working on any type of upgrade*

 

Edited by bikeman25

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    • TerraMaster F4-425 Pro review: an octa-core Intel NAS that ships with AI (OpenClaw) by Steven Parker It has been a while since I reviewed a TerraMaster NAS, but the company reached out to me asking if I was willing to test the F4-425 Pro, which goes on sale today. It is an upgrade on the F4-425 Plus, which I reviewed back in October 2025 What you need to know is that it basically follows the design principles of the four-bay F4-425 series, with its all-metal exterior. Here are the most important specifications: TerraMaster F4-425 Pro CPU Intel Core N350 (8x E Cores/Threads, Max burst up to 3.9 GHz) Intel Core N305 (4x E Cores/Threads, Max burst up to 3.8 GHz) TDP: 7W / 9W (Base) Graphics Intel UHD Graphics 32 EUs (1.35 GHz) Intel UHD Graphics 24 EUs (1.25 GHz) Memory 1x slot 16 GB DDR5 4800MT/s non ECC SODIMM (Max 32 GB) 1x slot 8 GB DDR5 4800MT/s non ECC SODIMM (Max 32 GB) Disk Capacity 120 TB (30 TB x 4) Supported RAID Types TRAID, TRAID +, RAID0, RAID1, RAID5, RAID 6, RAID 10 Network 2x RJ-45 5 GbE Internal storage 3x M.2 2280 NVMe Slot (PCIe 3.0 x1) Bootloader 2Gbit 256 GB NAND Flash card (MX30LF2G28AD) USB port (internal) USB Ports 1x Type-C 3.2 Gen 2 (10Gbps) 3x Type-A 3.2 Gen 2 (10Gbps) HDMI 1x (HDMI) Hardware Transcoding Engine H.264, H.265, MPEG-4, VC-1 Maximum resolution: 4K (4096 x 2160); Maximum FPS: 60 Size (H/W/D) 219 x 181 x 150 mm Weight 2.9 kg System Fan 150 x181 x 219 mm Power 90W, 100V - 240V AC, 50/60 Hz, Single frequency Power consumption (HDDs) 45W (4x 4TB ST4000VN008 in read/write state) 14W (4x 4TB ST4000VN008 in hibernation) Noise Level: 20.9 dB(A) Using 4 SATA HDDs/SSDs in standby mode; Test environment noise: 17.3dB(A); Test distance: 1m Warranty 2 Years OS TOS 7.0.0706 (Beta) MSRP £639.99, $699.99, €739.99 / £739.99, $799.99, €839.99 As you can see above, there are two variants of the F4-425 Pro releasing today. The lesser variant has the slightly weaker N305 CPU and iGP, and 8 GB less RAM, although it also costs $100 less than the top variant we are testing today. In addition, these new F4-425 Pros are shipped with the as-yet-unreleased TOS 7 beta. So what is TOS 7 exactly? During the device initialization, you are warned not to use it in a production environment, which we'll get into later. My contact told me that TOS 7 exits beta today, June 23 with version 7.0.0746. The clear difference with the F4-425 Plus is that it contains the more powerful N350 Intel CPU released in the first quarter of 2025, with support for DisplayPort 1.4, HDMI 2.1, LPDDR5 (4800), DDR5 and DDR4, and a max TDP of just 7W. It also supports AV1 decoding, as well as H.264, VP8, VP9, H.265 (8 bit), and H.265 (10 bit). The different capabilities in the Alder Lake-N (and Twin Lake) series are listed below. Processor E-cores L3-cache Turbo clock GPU GPU-clock TDP Intel N355 8 6 MB 3.9 GHz 32 EUs 1.35 GHz 9 W Intel Core 3 N350 3.9 GHz 1.35 GHz 7 W Intel Core i3-N305 3.8 GHz 1.25 GHz 9 W Intel Core i3-N300 3.8 GHz 1.25 GHz Intel N250 4 3.8 GHz 1.25 GHz 6 W Intel Processor N200 3.7 GHz 0.75 GHz Intel N150 3.6 GHz 24 EUs 1 GHz Intel N97 1.2 GHz 12 W Intel Processor N100 3.4 GHz 0.75 GHz 6 W The CPU is part of the Alder Lake-N series that sits just below the top N355 offering, albeit with an impressive TDP (less than the N355 and N305) for the features it offers. It is designed for low- powered systems and entry-level laptops. As before, we are seeing another NAS with an acceptable, if not great, amount of RAM. It should be noted that the F4-425 Pro only has one SODIMM slot, so if you are planning to upgrade the already 16GB included in this NAS, it will have to be on one module of Single Rank DDR5. As a reminder, up until a couple of years ago, it was commonplace to only get 2 or 4GB max on a flagship Synology or QNAP home NAS. Ever since the likes of TerraMaster and more have entered the market with ample RAM sizes included in their NAS offerings, it has gone a long way in forcing the hands of the traditional makers to up their game a bit. Before we dive in, you can view the different SKUs released so far since the 2025 series launched for Home and SMB users, with the most important specifications listed along with the MSRP listed below: SKU CPU Cores Memory Link Price F2-425 Intel N5095 4 4 GB DDR4 2.5 GbE x1 $249.99 F4-425 Intel N5095 4 4 GB DDR4 2.5 GbE x1 $369.99 F2-425 Plus Intel Core N150 4 8 GB DDR5 5 GbE x 2 $399.99 F4-425 Plus Intel Core N150 4 16 GB DDR5 5 GbE x 2 $569.99 F4-425 Pro Intel Core N305 8 8 GB DDR5 5 GbE x 2 $699.99 F4-425 Pro Intel Core N350 8 16 GB DDR5 5 GbE x 2 $799.99 The F2 in the product name means two 3.5-inch HDD bays, where F4 is four 2.5-inch bays. First impressions Like with the F8 SSD Plus packaging, the F4-425 Pro is using the upgraded box materials, which certainly look better than a plain cream colored box with TERRAMASTER stamped on the sides. The box gives off a premium feel and certainly adds a positive vibe to first impressions. In the box F4-425 Pro TNAS device Power adapter LAN cable (CAT 6) Quick guide [full online guide] Limited warranty notice Screws (for HDD bays) Stickers 2x rubber feet (spares) Design As has become kind of common with TerraMaster, certainly in the last three years, the 2025 F2- and F4-series have received a makeover that really adds to the premium feel of the NAS. Gone are the plastic shells, now replaced with an aluminum outer shell, with the front and back retaining the textured black plastic we saw on the 2024 models. Some key differences from the 2024 series include placing the power button back on the front, along with the addition of a Type A USB port. It's not much bigger or heavier either; in fact, it weighs 500 grams less than the F4-424 Pro. It's slightly shorter in height and depth (length), but only by a few millimeters. The front and back do retain a similar style to the 2024 series. On the front, you just have your four bays along with LED indicators for the HDDs and power. The welcomed change is having a USB port on the front for quick access, should you need to back up a USB drive, for example. Around the back, from top to bottom, you have a reset pin hole, an HDMI port, two 5 GbE Ethernet ports, two USB 3.2 Gen 2 (10 Gbps) Type A ports with a Type-C port below them, and a connector for the barrel port power source. Again, there's no Kensington Security Slot present, which is a bit of a shame considering it's a data storage device. Left side Right side On the left and right of the F4-425 Plus, it is completely smooth aluminum with a TERRAMASTER logo printed on both sides. On the bottom, there are some holes to assist ventilation. Unlike with the F4-425 Plus, the rubber feet did come unstuck during the teardown, which was also an issue on the 2023 series. It seems like other customers have lodged complaints about them, as TerraMaster now includes two spare rubber feet in the box, in case any of the preinstalled ones are lost; however, this seems more like a papering over the cracks solution rather than actually fixing the issue with better quality rubber stand-offs. There are also four screws that must be removed in order to access the internals. Teardown Upon removing the four screws, you can slide the device out of its shell to reveal the three NVMe M.2 slots (PCIe 3.0 X1) and single SODIMM slot connector, which is populated with a single 16GB DDR5 4800MT/s module. I added a couple of MP44Q M.2 PCIe 4.0 SSDs (2 x 4TB) that can be availed on Amazon for $492.99 that TEAMGROUP supplied us with, along with a 250GB 970 Evo Plus that my colleague Chris White sent me by accident and let me keep a few years ago. As I have said in previous reviews, TerraMaster support staff actually encourage installing whatever you want on their devices, and happily, the USB port for the bootloader is now easily accessible should you want to use it for your own flavor of NAS OS, such as TrueNAS, Unraid, or maybe Xpenology. Yes, because TerraMaster has now switched to a 256 GB NAND Flash card (3rd photo above) for the TOS bootloader. This is also replaceable, but you can also simply add a USB bootloader, access the BIOS, and tell the F4-425 Pro to boot from that instead of the Flash card. Unlike earlier iterations of TerraMaster NAS, you don't have to tear this down any further than the four screws on the outer shell in order to be able to access and manage the memory, NVMe slots, and USB bootloader. However, if you need to access the NAND Flash card or CMOS battery, then eight more screws (four on each side) need to be removed in order to take off the rear panel with the 120mm fan, and then the motherboard can be lifted off and removed from the SATA connector PCB. There's also no risk of threading the screw holes, because the four that hold the shell in place are metal on metal, while the screws that hold the rear panel on do screw into plastic. Either way, like last time when I reviewed the F4-425 plus, I was just happier to see larger screws being used. Overall, it follows some great improvements in build quality from the 2024 series and earlier. Setup BIOS The F4-425 Pro includes an Aptio BIOS from American Megatrends [1, 2], and you can setup pretty much everything here including the boot order, which is locked to the UEFI OS, however above that choice you can enable or disable booting to the USB bootloader so this would still allow you to switch to a USB stick with an alternative bootloader and boot from it, or disable it to instead always start from the first disk with an OS installed on it. Initial Setup Setup is roughly the same as the F4-425 Plus, along with the new TOS 7 setup dialogs, so there will be no surprises here. Upon connecting to the LAN and booting up, the F4-425 Pro can be reached by navigating to http://tnas.local. If that doesn't work, you can use the local address assigned via DHCP, which you can find using the TNAS PC desktop application, which is essentially a TerraMaster NAS finder. The setup process is pretty straightforward, through a wizard, and in full below: TOS 7 Initialization As you can see, TOS 7 received a new coat of paint, and the initialization requires fewer interactions. Happily, TOS no longer decides to throw all disks into the same Storage Pool; 2.5-inch HDDs are allocated into Storage Pool 1. This is because two of the HDDs are allocated to hold system files. Previously (with TOS 5 and 6), if you pre-installed HDDs and SSDs, they were all placed into Storage Pool 1, even if you did not select the SSDs for inclusion during the onboarding. TOS 7 Setup On first boot, there is a tutorial and some steps to take to harden the TNAS (or not), which includes an immediate update from TOS 7.0.0616 to 7.0.0706, of which the changelog screenshot is also included in the above gallery. It must be noted that the Security Advisor still contains (in my opinion) a pretty major bug in that if you enable SPC and then do the required rebooting, the Security Advisor still says that SPC is disabled. TerraMaster provided the following statement about it: It is disappointing that TOS 7 has been in beta since December, and this OOBE issue is still there. Shutdown option has moved Instead of a Taskbar option to manage the NAS, all of these options have been moved to a "Start panel", initially I didn't see it and my contact had to show me how to power off the F4-425 Pro. To logout, reboot or power off you can find those controls at the top right of the Panel. It is also possible to power off through the TNAS mobile app beta. Storage setup Above, you can see the steps I took to create the Storage Pools and Volumes. I made a second Storage Pool using TRAID on two 4TB MP44Q SSDs (which, in this instance, is similar to RAID 5), and finally, I added the 250GB 970 Evo Plus drive as Hyper Cache on Storage Pool 1 in Balanced mode. Registering If you decide not to lock down the F4-425 Pro in Security Isolation Mode (blocking all external connections), then you could set up a TNAS device ID through the Remote Access setting in the Control Panel (which must be unique). This works in combination with an online TerraMaster account. TOS 7 TNAS Online Creating a TerraMaster account and linking the device online activates the warranty when you provide proof of purchase and the serial number, but it also gives you access through the TNAS mobile app, which allows you to complete certain operationsб including powering off and restarting the NAS remotely. A TNAS mobile update is required to gain access through TOS 7, and this is provided on the TerraMaster website, as it is not yet on Google Play. The app is evolving all the time and has made leaps and bounds since I first started reviewing TerraMaster devices almost three years ago. It is not quite there yet if you are comparing the likes of Synology, which, sadly, a lot of users online do all the time. OpenClaw setup One of the main selling points of the new F4-425 Pro is the inclusion of OpenClaw, with TerraMaster claiming that it is "powered by the world's first AI-native TOS 7 OS, supporting local-first smart workflows and independent data control." However, I immediately ran into problems trying to enable OpenClaw. After waiting 20 minutes at the "Enabling" message of the OpenClaw app following installation, I decided to do some searching online and discovered that it couldn't complete the installation process due to SPC being enabled, which is something TOS 7 immediately recommends to be enabled on first boot. SPC for NAS (TOS 7) is basically the same principle as UAC in Windows; it blocks executables from being launched by non-Super Users. After reaching out to my contact about these issues, I received the following response: Anyway, this only became clear when I closed the OpenClaw app screen and clicked on the OpenClaw icon in the taskbar; that is when I saw the message about disabling SPC. I think, due to the fact that this is a requirement, this should be a prompt during the installation process, not when closing the App Market and then trying to launch OpenClaw. There's also no 'Getting started' guide for people like me who have never used OpenClaw. I tried to add an LLM and discovered the tutorial led nowhere. That's when I started looking around the official TerraMaster forums, and I found a guide that helpfully explains that you won't get anywhere with OpenClaw unless you have a paid plan, which is disappointing because I imagined there would be an option to use a local LLM as I do in SubtitleEdit with Whisper-XXL. In addition, with the marketing imagery on the official site, it says that the OpenClaw feature is "all processed 100% locally for absolute privacy." which led me to believe that I could install a local LLM, not one that required paid tokens. In any case, TerraMaster does not provide guidance for this new feature, which was also a selling point of the F4-425 Pro! My contact also provided clarification about the above points I raised with TerraMaster Since it is not in the scope of the review to add paid services, I'll leave that to the people who are more qualified with OpenClaw. F4-425 Pro Surveillance App TOS also comes with a Surveillance app, which is not installed by default; it can be found in the App Market recommended section. In addition, after installing, it doesn't drop a shortcut on the Desktop or top taskbar, but you can "Send to Desktop" from the App Market listing for the app for a quick way to open it. Adding my Reolink POE doorbell camera was painless. TerraMaster doesn't appear to have a repository of preconfigured cameras; instead, the camera must be added using ONVIF or RTSP. No mobile Surveillance app TerraMaster still doesn't have a dedicated Surveillance app, although from searching online, Surveillance can be used and managed through the TNAS mobile app. I tried this with the updated TNAS mobile app beta in combination with TOS 7 and got a message that Surveillance was "Only accessible through web browser," so I reckon this must be limited to the stable versions of TOS 6 and the mobile app. More quirks In addition, whenever I minimized the Live View window in the browser Surveillance app, the feed appeared to switch to the Low-bandwidth stream, and there was no way to get the High-quality stream back. To get the High-quality stream back, I had to close Live View and then reopen it. Benchmarking A pretty cool feature of the TOS 7 is that it allows you to install directly to the NVMe M.2 SSD. In order to do that, you would have to leave out any HDDs during initialization, and even then, the system partitions are always written to two HDDs when they are eventually added. With three NVMe slots, this also gives an interesting scenario where you could build a TRAID storage Pool for installing all your apps and Docker on, and keep the third for SSD cache on the HDD pool. Limitless options! SATA PCIe 3.0 X1 A CrystalDiskMark test on a mapped network drive from within a Windows 11 25H2 PC (image above) connected over a 5 GbE hub was well within acceptable ranges. Although the read result on SATA was a little less than with the F4-425 Plus, for some reason, while writes were generally better. SATA PCIe 3.0 X1 I also ran the NAS Performance tester, which tests the link speed performance. As you can see, it pretty much maxes out the 5GbE connection. Of course, you can also opt to bond the two 5 GbE connections for a bit more umph, but I didn't do that. TOS 7, which, as of testing, is still in Beta, comes with an App Center that has a bunch of handy programs you can install right off the bat, such as Emby, Plex, Docker, as well as in-house Backup and Surveillance solutions. As you can imagine, any media streaming services you would want to host off the F4-425 Pro will work great, thanks to the Intel Core N350 CPU and its 16 GB of DDR5 memory. Accessing from mobile is only possible if Security Isolation Mode is disabled, which can put your NAS at risk from external sources, so there was no way to access it from the TNAS Mobile app. It's also quiet. I had this sat next to my computer on my work desk for the past week, and I did wonder if the noise I was accustomed to with NAS devices would annoy me, but all I could hear was a soft whirring of the rear fan (which was a little annoying) when the disks were not actively copying or reading data. Conclusion So what have I learned? Unfortunately, this release raises a few important questions and concerns that I feel haven't been adequately addressed. What I didn't like Our variant shipped with TOS 7 beta, and it's advised not to use it in a production environment. I feel that's a bit limiting on an $800 device. The mobile app is also still in beta and does not support some of the first-party apps, like Surveillance, and it still has quite a few bugs. I am a bit confused about the OpenClaw marketing along with the F4-425 Pro. I feel like that if it's going to be a main selling point, then offer official guidance on how to get started with it. TerraMaster recommends enabling SPC, but then markets the NAS for use with OpenClaw, which requires disabling SPC to be able to use it, opening up genuine security concerns for the NAS; and that's before you get into the security concerns of OpenClaw itself. Of course, the above issues won't be a problem if you decide to install something else on it, or even go back to the stable TOS 6. I wish TerraMaster had just given TOS 7 as opt-in rather than shipping with it. TOS 7 has been available as a preview since December 2025 (so well before my last TerraMaster review), and according to a thread on Reddit where a user shared a screenshot from the TerraMaster Facebook page, it is scheduled to launch today, June 23, but there's nothing about that in the TerraMaster news blog. My contact confirmed over email that TOS 7 exits beta today. The rubber feet also deserve a mention as they continue to be a problem, with them coming unstuck the moment you shift the F4-425 Pro anywhere on your desk. What I liked What it comes down to, though, aside from what I already mentioned, you are still getting a quality, affordable device here, so recommending it will depend on the individual's use case. If you're just looking for a relatively small NAS device to manage virtual machines on, backup your files, and take care of your home theater streaming, then it is a great device that will certainly futureproof you for some time. It provides good performance, takes up little space, and is, on the whole, very quiet. Four bays afford proper redundancy using TRAID or RAID 5, and you can even expand on storage capacity by adding the 2-bay D5, or 4-bay D8 Hybrid DAS over a USB 3.2 (10Gbps) link. Considering the 2024 releases were more about power, with the likes of an Intel Core i5-1235U high-end laptop CPU under the hood, I asked my contact last time if we could expect more of the same in higher-end models and was told: It makes a lot of sense to use Intel's N350 chip inside a NAS; it is more than capable of doing what the F4-425 Pro is intended for, media streaming and backup. The only downside is still the clear lack of community and even staff support on the official forums. In the past, I have had topics go unanswered for days, or there would be generic-type "we've noted this and passed it onto our developer team" type responses. Along with the other things I mentioned, it all ends up costing it a couple of points. If you are comfortable with the command line, Docker, and setting up TrueNAS or Unraid, you'll be fine. You can do great things with this hardware. In TOS, the apps are a bit lacking, and things don't always work as expected.\ AI NAS?! What has become clear to me this year is that we are going to start seeing all kinds of "AI NAS" come to market, and while that might be good for us consumers, be diligent and research these claims. Although the F4-425 Pro technically comes with AI, it is really using a cloud service that is externally sourced off-device through the third party OpenClaw app. My colleague did review a newcomer to the NAS space earlier this year, and it includes a local AI assistant inside the Zettlab D4 NAS, and they do not even use AI in the product name, check out Chris' review here. Where to buy and a discount coupon However, it does not change the fact that this is truly a great entry-level home media-class NAS that you can buy right now. TerraMaster is having a 20% off launch discount, plus you can also still apply our unique 10% off coupon on checkout, which only works on the official website. So here is a breakdown of the pricing that is only valid on the official TerraMaster website. TerraMaster F4-425 Pro (N350) + 20% discount + 10% coupon = $575.99 TerraMaster F4-425 Pro (N305) + 20% discount + 10% coupon = $503.99 TerraMaster F4-425 Pro (N350) + 20% discount + 10% coupon = £525.59 TerraMaster F4-425 Pro (N305) + 20% discount + 10% coupon = £460.79 Use NEOWIN coupon code during checkout for 10% discount Over on Amazon US and UK, the F4-425 Pro also gets a 20% launch discount, but here, the above 10% coupon cannot be applied. TerraMaster F4-425 Pro (N350) for $639.99 at Amazon US (was $799.99) TerraMaster F4-425 Pro (N305) for $559.99 at Amazon US (was $699.99) TerraMaster F4-425 Pro (N350) for £583.99 at Amazon UK (was £729.99) TerraMaster F4-425 Pro (N305) for £511.99 at Amazon UK (was £639.99) As an Amazon Associate, when you purchase through links on our site, we earn from qualifying purchases.
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