Robo copy to root or find files from your computer and then copy it to shared folder on network.
net use n: \\server\backup
SET SourceDir= n:\%computername%
robocopy c:\ %SourceDir% *.doc* *.ppt* *.xls* *.pst* *.pdf /s /LOG:%Log%
The addition of * on either side of the office documents is to ensure that you copy all versions from Office-2k3 and above. I have also included the PST files.
Hope this was helpfull.