That might even be an 8" floppy; for a while those did exist (1970s) https://en.wikipedia.org/wiki/History_of_the_floppy_disk
May 01, 2017
March 26, 2017
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That might even be an 8" floppy; for a while those did exist (1970s) https://en.wikipedia.org/wiki/History_of_the_floppy_disk