The first floppy disks, invented and made by IBM, had a disk diameter of 8 inches (203.2 mm). I still keep them today. They are commerically available in the 1970s. And i first acquired them while attending my first PC course back in 1990s while i was around 8 years old. It is indeed a piece of history and in todays' standard, we are able to keep 1TB worth of data in a small microsd card.
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