Just as a point of reference. My "My documents" folders is currently at 5.27 gig. Carbonite has no limits on back-up size. My "Documents & Settings" folder is ovr 9 gigs.
With Carbonite, I can recover a single email, a single file, a single folder, multiple emails, files, and folders or the whole shebang if I need to. It automatically backs up everything so I don't need to pick and choose what might be expendable and what is not.
I'm all for open source and free, but sometimes it pays to pay. For a little over 4.50 a month, I can be worry free about all of my data.