Not really sure what you are backing up englishmen, but I use this power tool, synctoy
http://www.microsoft.com/downloads/details...&DisplayLang=en.
I can back up all my music and photos etc with 2 clicks ( after setting up the folders). It is the easiest thing I've ever used.
A few different options are available, I chose echo as i wanted the files on my external drive to be a mirror of the files on my c drive.