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Vaguely-related: With an OTG adapter (eg USB C to A), a person can plug a USB floppy drive into their pocket supercomputer.

A single disk won't even hold a single photo from the device's many-megapixel camera, but it works fine -- Android, Apple, whatever.

It is approximately the funniest fucking thing ever to have a floppy drive whir to life while connected only to a smartphone, and I strongly suggest to anyone with the means to make the time to experience it.