Do any of you use any commercial service for backing up your personal (home) hard drives? I back up my files on an external drive that sits right on top of the computer. That's great protection against disk failure, but doesn't help much in the event of a fire or some other event that would wipe out both drives since they are in the same physical location. So I'm wondering how effective and economical it would be to store files offsite on some server. Also wondering how secure they'd be, with the general understanding that nothing is completely hackproof.