If you just want to backup folders, then look at Microsoft's SyncToy version 2.0. Link is http://www.microsoft.com/downloads/details.aspx?familyid=C26EFA36-98E0-4EE9-A7C5-98D0592D8C52&displaylang=en.
I use this to backup all of my Documents, Downloads, Favorites, Music, Picture and Video...