I have the following batch script running on a scheduled task, which creates a 7-zip file like this:

Looking for any input - thanks a lot!
@echo off
echo Backing up SVN... do NOT close!
echo.
echo.
for /f "tokens=1-4 delims=/ " %%a in ('date /t') do (set bdate=%%c-%%a-%%b)
for /f "tokens=1-2 delims=/:" %%a in ('time /t') do (set btime=%%a-%%b)
cd %temp%
rd /s /q svnbackup >nul 2>&1
md svnbackup
cd svnbackup
md certs
md conf
net stop VisualSVNServer >nul 2>&1
svnadmin dump --deltas --quiet S:/Customers > Customers.dump
svnadmin dump --deltas --quiet S:/Internal > Internal.dump
net start VisualSVNServer >nul 2>&1
for %%I in (S:\authz S:\authz-windows S:\htpasswd C:\INTERNAL\SVN\Backup.bat) do copy %%I . >nul
copy "%VISUALSVN_SERVER%\certs\*" certs >nul
copy "%VISUALSVN_SERVER%\conf\*" conf >nul
"%ProgramFiles%\7-Zip\7z.exe" a -mx9 %bdate%_%btime%.7z *
move *.7z C:\Users\DB\Dropbox\Backups\SVN >nul
cd ..
rd /s /q svnbackup >nul 2>&1







