FileLight.com

EzBackup101 was designed especially for people who don't know much about computers. It's not confusing or complicated and doesn't fill your screen with all kinds of geeky stuff. Just install it, point it to a backup drive (such as an external USB drive) and you're good to go. Set up your own backup schedule if you like--or just do nothing. EzBackup101 will automatically backup all your new and changed files at the same time every day.