I was looking through my old posts here and thought I'd give an update on what online backup systems I was still using. I'm have to admit I'm still using Mozy Online Backup. It works great, it's all automatic and I don't have to wonder if my super important files are safe or not. I don't think online only backup is the way to go though, it is just another measure to be safe. If you don't have a readily available external hard drive handy though, it's a great way to get started.
