@foone Floppy disk quiz: Correct me if I'm wrong, but I don't think MS-DOS has a media descriptor for 5.25" 720K. There's one for 1.2M, 360K, and 320K. And two more for the one side version of those last two, 180K and 160K.

But I don't recall a 720K. There's a 720K for 3.5 that's 2 sided and 9 sectors. But I don't recall a 720K for 5.25.

But I could be wrong, but that's my guess here.