Backup Software gesucht

@echo off
:LOOP
net use z: /delete
net use z: \\server\share
if errorlevel 1 (
	goto :ERROR
) else (
	goto :OK
)

:ERROR
echo ERROR! Trying again....
timeout /t 5
goto :LOOP

:OK
echo OK! Backing up...
robocopy ....
pause >nul

IF EXIST Z: (GOTO Backup)

:Backup
robocopy ....

REM 2.Archiv (Differential)

set Full7zName=Backup-voll
set Diff7zName=Backup-differential
set SevenZBackupFolder=E:\Backup7z
set Diff7zFolderFile=%SevenZBackupFolder%\%Diff7zName%-%datetime%.7z
set SourceFolder=D:\BackupQuellOrdner
set password7z=secretpassword
set Diff7zFolderFile=%SevenZBackupFolder%\%Diff7zName%-%datetime%.7z

if not exist %SourceFolder% exit
if not exist %SevenZBackupFolder% exit

7z.exe u "%Full7zName%.7z" "%SourceFolder%\*" -p%password7z% -mhe -t7z -mx5 -u- -up0q0r2x2y2z0w2!%Diff7zFolderFile% >> "%SevenZLog%" 2>&1

REM mhe=header encrypt, t7z=7z archive
REM -mx 0=store 1=fastest 3=fast 5=normal 7=max 9=ultra
REM p - File exists in archive, but is not matched with wildcard.
REM q - File exists in archive, but doesn't exist on disk.
REM r - File doesn't exist in archive, but exists on disk.
REM x - File in archive is newer than the file on disk.
REM y - File in archive is older than the file on disk.
REM z - File in archive is same as the file on disk
REM w - Can not be detected what file is newer (times are the same, sizes are different)

REM 0 Ignore file (don't create item in new archive for this file) 
REM 1 Copy file (copy from old archive to new) 
REM 2 Compress (compress file from disk to new archive) 
REM 3 Create Anti-item (item that will delete file or directory during extracting). This feature is supported only in 7z format.