Macintosh HDI-20 External 1.4MB Floppy Disk Drive
The Macintosh HDI-20 External 1.4MB Floppy Disk Drive was an optional external floppy disk drive manufactured by Apple Inc. (then Apple Computer) for use with their PowerBook Duo series of sub notebooks and also the PowerBook 100 (no other 1xx series models are supported) by means of a custom HDI-20 connector. The drive requires no drivers or other software and appears as a normal floppy drive when attached. PowerBook Duo systems require a PowerBook Duo Dock (or mini dock) to be attached to provide the HDI-20 port. A smaller, cheaper solution is to use a Macintosh PowerBook Duo Floppy Adapter to provide the port.
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