This is the best application I have seen built by Microsoft. They finally get something right, backup’s made easy. With the options available and the ability to run as a task, Synctoy 2.0 is FREE and EASY!
http://www.microsoft.com/downloads/details.aspx?familyid=c26efa36-98e0-4ee9-a7c5-98d0592d8c52&displaylang=en
Here are the available Backup options:
Synchronize: New and updated files are copied both ways. Renames and deletes in one [...]