Apple Disk II

The Apple Disk II is an external 5.25″ floppy disk drive that was designed, manufactured, and sold by Apple from 1978 to 1984. Disk II has been introduced on June 1, 1978, and its price started at $495 in pre-order.

The Disk II was designed specifically for use with the Apple II computer to replace the slower cassette tape storage. These floppy drives cannot be used with any Macintosh without an Apple IIe Card as doing so will damage the drive or the controller. This Disk II has been discontinued on May 1, 1984.

Apple didn’t originally offer any floppy disk drive for the Apple II, which used data cassette storage like other microcomputers of the time. Apple’s early investor and executive Mike Markkula asked cofounder Steve Wozniak to design a drive system for the computer after finding that a checkbook-balancing program Markkula had written took too long to load from tape.

The Disk II was very successful for Apple, being the cheapest floppy disk system ever sold up to that point and immensely profitable for the company, in addition to having nearly 20% more storage space than standard FM drives.

Today Apple Disk II is 44 years old!

Apple Disk II
Source: – Apple Disk II

Apple Disk II Release Date and Original Price

IntroducedJune 1, 1978
DiscontinuedMay 1, 1984
Model NumberUnknown
Order NumberA2M0003
Original Price$495 Pre-order
Regular price

System Requirements

  • Apple II computer
  • Macintosh computer with Apple IIe Card


Connection1 – 20-pin ribbon cable connector (Optional DB-19 adapter; later was a standard)



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