Yeah, recently I saw an external hard disk from Western Digital. It has some "Auto Backup" feature. From what I've read and understand, what it does is whenever you download a file or save a file to your primary hard-disk, it is immediately backup (or rather, cloned) to the external hard-drive. Unfortunately, I'm still using my favourite old Seagate 500GB external hard-drive. And I'm wondering if there's such software to do the exact same thing? You never know when your hard disk fails or your laptop gets stolen... all the important IM and personal stuffs goes POOF! So please recommend a good backup software if any of you are using it.