I have a 160GB Iomega drive for storing my music and backups. It's worked reasonably well until now (though sometimes I need to restart PC to get PC to see it...)
The big problem is that since last week it 'looks' empty. There's ~100GB of data on it but if you open the drive in Explorer, it looks empty. It says there is only ~50GB free, so that means it's not been wiped, but I can't see the files.
If I save something new, it is visible.