Review  When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

Terramaster F4-423 review: it's the cheapest media class 4-bay NAS on the market

Terramaster is a brand we've seen here before at Neowin. I mostly praised the 2-bay F2-223 for being far cheaper than the competition, but at the same time, being a capable file backup and media server option. Now they are back with the slightly larger 4-bay F4-423 which we're taking a look at today.

I've had a little experience with these devices, having owned a QNAP TS-253Be, and now a Synology DS720+ but for me, I only acquired them to do local and cloud backup and run my home theater solution using a combination of Emby and Plex.

All of the aforementioned NAS devices I've owned are media-class, meaning they fully support having Emby or Plex installed on them and streaming over the network, aside from a few other things installed via Docker containers, or being able to follow a clear tutorial, that's about the extent of my expertise into the realm of network-attached storage devices goes; I'm still learning.

Here are the most important specifications:

Terramaster F4-423
CPU Intel Celeron N5095 (Quad Core 2.0 GHz, Max burst up to 2.9 GHz)
Graphics Intel UHD Graphics 16 EUs (Jasper Lake)
Memory 4 GB, maximum 32 GB (16 GB x 2)
Disk Capacity 80 TB (20TB x 4)
RAID Level RAID 0, RAID 1, JBOD, single, TRAID
Network 2 RJ-45 2.5 GbE (10/100/1000/2.5 GbE)
Internal storage 2 x M.2 2280 NVMe Slot
USB Ports 2 x 3.1
HDMI 1 x
Hardware Transcoding Engine

H.264, H.265, MPEG-4, VC-1
Maximum resolution: 4K (4096 x 2160);
Maximum FPS: 60

Size (H/W/D) 227 x 225 x 136 mm
Weight 3.6 kg
Price $499.99

As you can see, it is virtually the same as the F2-223, with the exception of a slightly better CPU, which is a media-class Intel Celeron N5095 quad core processor that came out in Q1 2021; that's up from the F2-223's dual core Intel Celeron N4505. The F4-423 also ships with just 4 GB of RAM but it supports up to 32 GB, and with memory being relatively cheap these days, it would have been nice to see it tricked out to at least half its maximum supported 32 GB. Even QNAP now ships their latest four-bay TS-464 with 8 GB of memory, and it costs less than $100 more.

First impressions

terramaster f4-423

The packaging is nothing to write home about, and again, the 4-bay option did not come in a comically-oversized box. Minimal packing materials were used. Everything you need to get yourself started is included.

In the box

  • F4-423 TNAS device
  • Power adapter
  • LAN cable (CAT 6)
  • Quick guide
  • Limited warranty notice
  • Screws (for HDD bays)
  • Stickers

terramaster f4-423


Although this is a budget device compared to the likes of Synology, you wouldn't think so from the design and build quality, the case is entirely metal and is cool to the touch even after the F4-423 has been powered up all day. It's also quiet. I had this sat next to my computer on my work desk 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.

terramaster f4-423

On the front, you just have your four bays and power button along with LED indicators for the HDDs, LAN and Power. It would have been nice to have a USB port on the front, but alas, no such joy here.

terramaster f4-423

Around the back, you have your two 2.5 GbE Ethernet ports, an HDMI port, and a connector for the barrel port power source. There's no Kensington Security Slot present which is a bit of a shame considering it's a data storage device.

terramaster f4-423

On the bottom, there are plenty of holes to assist ventilation, however, as was the case with the F2-223, it's not immediately obvious how you can expand the memory or add NVMe storage.

terramaster f4-423

After a bit of looking around, because there is no documentation on how to access the F4-423 to expand memory or NVMe storage, I discovered that I had to remove 10 screws. Six screws around the back fans, and 4 screws on the bottom to remove the bottom plate (which was probably not even needed). After unplugging the two fans, you can then slide out the internal frame to gain access to the empty memory, and two NVMe slots.

An extra memory module can easily be installed on the bottom of the main board, and if you're careful, it's possible to swap out the already included 4 GB module, although there is limited space to do this. Next to the memory module, there's relatively easy access to the CMOS battery too, which means further dismantling can be avoided.

If you need to access the already included 4GB SODIMM you can unscrew the four screws on the PCB (indicated by the four red arrows in the above top left image) and carefully lift off the PCB to disconnect it from the PCIe x4 slot. Now you have access to the 4GB SODIMM so that you can easily replace it for something else.

You may also notice that it is possible to add a couple of M2 SSDs for drive caching, this SSD caching is supported and accounted for in TOS 5.1, but had I not taken the F4-423 apart I would not have known it was possible to add an NVMe, since it is not included in any documentation (although the possibility is mentioned in the specifications).

It's good that some thought has gone into the expandability of the F4-423, but you'll have to remove ten screws to achieve it, so be prepared for some downtime.

terramaster f4-423


Setup is exactly the same as the F2-223, so there will be no surprises here. Upon connecting to the LAN and booting up, the F4-423 can be reached by navigating to http://tnas.local or if that doesn't work, by the local address assigned via DHCP which you can find using the TNAS PC desktop application, which is essentially a F4-423 finder.

terramaster f4-423

The setup process is exactly the same as the F2-223 so I've left that from the previous review in full below.

Terramaster F4-423
Cheap Good build quality Hardware transcoding Dual 2.5 GbE NIC Quiet!
Lack of documentation Hard to access NVMe Hard to access memory
June 2023


Report a problem with article
sega bass fishing
Next Article

Reel in the classic game Sega Bass Fishing for free to keep on Steam until July 31

MonoDefense artwork
Previous Article

Save 62% on this price dropped lifetime subscription to MonoDefense by KeepSolid

Join the conversation!

Login or Sign Up to read and post a comment.

18 Comments - Add comment