USB floppy drives do not implement a full floppy controller. I’ve never seen one that can handle other than 512 byte sectors, and or sector counts other than those used on MS-DOS 720K and 1.44MB formats. Even there, there is an issue with coercivity on media and head width that create problems with actually using 720K formats.
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As such, you’re going to need a laptop or desktop with an actual internal floppy. (A laptop that uses an external floppy with a 26+ pin cable rather than USB will likely work as well).
