I got a cheap usb floppy drive! "Tendak" brand.
Testing real quick on my Raspbian Pi3.
Mounted and read msdos 1.44m and 720k format. Expected.
Read 1.44m Mac HFS! Nice.
Would not read Tandy 600 360k. Sad but expected.
I thought I had some minix or ext2 disks but I guess not?
Sometime when it's not bedtime i'll hook it up to the RISC OS Pi and see what it thinks.
Mostly just seeing if a Pi could handle a device that wants 500 mA!