I am trying to make a script to copy the users local files every 6 hours. I got one that works but I want to modify it so that it only does differential copies to save disk space. Here is the code I have... @echo off Set Monthfolder=Monthly\%Date:~-4,4%-%Date:~-10,2% Set Dailyfolder=Daily\%Date:~-4,4%-%Date:~-10,2%\%Time:~-11,2%;%Time:~-8,2%;%Time:~-5,2% @echo Backing up local files... @\\10.100.100.7\scripts\robocopy "%userprofile%" \\10.100.100.7\backups\userfiles\%username%\%Dailyfolder% *.do* /if *.xl* /if *.pdf /if *.pp* /if *.txt /XD %userprofile%\AppData /XD "%userprofile%\Application Data" /s /COPY:DAT /r:1 /w:1 /np > h:\BackupLog.txt @\\10.100.100.7\scripts\robocopy "%userprofile%" \\10.100.100.7\backups\userfiles\%username%\%monthfolder% *.pst* /XD %userprofile%\AppData /XD "%userprofile%\Application Data" /s /COPY:DAT /r:1 /w:1 /np >> h:\BackupLog.txt Need a robocopy expert.

Try tossing the "/xo" argument in your string. That will only copy files newer than the destination version.

I need it to compair with an old directory or a master copy and only backup the files that where changed like a differential but more of a shadow copy.

Ok, after thinking about this what I have come with is that I need to somehow log what was backed up and compare the date time for changes and only backup what has changed. So not just a differential but a shadow copy.