Well, it's not really a toy.
http://synchronicity.sourceforge.net/downloads.htmlClick on "download installer package"
Nice little open source software from Sourceforge for managing the backing up (mirroring) of your files to secondary (backup) drives. Once the backups established, it only copies new or changed files and deletes ones deleted in the source. You can "preview" what's going to happen before you select "sync".
Hmmm, guess I'm the only one that keeps synchronized files on 2 drives. (10/25)