The tragic thing is, I thought I had. But the computer reported that it had copied data across, and it hadn't.
As far as multiple backups go - I'm going to start storing *some* of the field notes data places like my web server, but I hadn't yet. (The half-gig audio data files I'll have to redownload from the servers at uni - which I can do when I'm on campus, because downloading gigabytes of data is better done via intranet for EVERYONE'S benefit.)