answer:Is Time Machine excluded because you don’t have Leopard? A lot of external hard drives come with automatic backup software. It’s usually pretty clunky, but it will get the job done. If you’re hardcore, you could try rsync for complete control. I use Mozy, because nothing beats automatic offsite backup. I currently have 53GB of my most important data backed up on Mozy’s servers. For the most part, I’ve been very happy with the service, and it’s just $5/month.