I used to have a SCSI interface version of that drive type, I made backups of my Mac Plus
(I think it was) hard drive. Since I don't have it currently, I believe I gave it to
a friend along with the rest of my Mac Plus peripherals. I don't recall the capacity
of my specific drive, but it used a "data cassette", which had a notch in the
tape case to prevent use of regular cassette tapes.