I keep all my data on a pen drive (encrypted) that I take between home and school. Everything is on that drive. Last week it started misbehaving and I couldn't back it up at all. I couldn't find out when it had last backed up so this has been going on for a while. Panic set in and I went and bought a portable hard drive yesterday rather than a pen drive. Data moved, back up done and relief set in. Phew!