Here are some Apple HD20 Photos I recently uploaded. They show the outside and inside of the drive, including some closeups of the Rodime mechanism and Apple controller card. This drive is still in good working order and serves me well on a Mac 512k (original 64k ROMs). It's faster than a floppy (of course), but not as fast as the GCC Hyperdrive 20 (which I also own). The Hyperdrive feels more like a SCSI drive attached to a Plus.

Anyway, enjoy.