I would start with something like this...
Code:
@echo off
rd /s C:\BACKUPDIR
mkdir C:\BACKUPDIR
xcopy /s/e/v C:\DATADIR C:\BACKUPDIR
This will copy all of the files in DATADIR to BACKUPDIR every time you run it. Just change DATADIR to the highest-level directory where the files you need to save are stored.
Warning: This will only save one backup revision at a time.