Invented by Alan Shugart at IBM in 1967, the original floppy disk ... 1.44 MB which was the most commonly known standard by the late 80s. Other less common formats of 3.5-inch floppy drives ...
IBM offered an extra-high density 2.88MB drive on selected PCs that was backward compatible, but the format never caught on. Floppy Disk Formats 720KB 3.5" DS/DD 1.44MB 3.5" DS/HD 2.88MB 3.5" DS ...
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