I remember those.
PREPARE.COM could be used to divide the 40 MB model into two 20 MB drives.
At the time, one hypothesis for the high failure rate that we observed, was that the combination of heavy weight plus the quite slippery case, led to many units being dropped. Users don't admit to dropping expensive items like that.
I still have some optional 9V battery holders that plug into the drive tray. They catered for mains power failure, in which event, you would push an extended paper clip into the hole on the front panel, and the battery would then power an emergency eject.
