Macintosh Hard Disk 20

Description

HD20 M0135. One of Apple’s first external hard drive developed for the Macintosh. Made for the 512K, the hard drive uses the external floppy port. It also has a port that you can plug another HD20 or your floppy drive into, so you don’t lose the use of your external disk drive. This is not a SCSI hard drive inside or out.

The Hard Disk 20 holds a whopping 20MB of data which is over 50 times the space of a 400K 3.5″ disk. It also introduced us to the Hierarchical File System (HFS). Start up from a floppy disk is required for the 512K, but with the 128K ROM, the 512Ke and Plus can boot directly from it.

SN: F6050XTM0135. This is a non working drive. I believe this drive will spin up, but not initialize. As it is pre SCSI and uses a proprietary Rodime drive, it is not fixable by us. Case is in good condition but has severe discoloration on the front and sides with large lighter spot on the front where sticker was previously. Probably medium discoloration elsewhere. Apple logo has a few scratches in it. There is a black, 3″ x 3″ security lock on the top rear.

*Photos are representative and not what you will receive.