You left out 5 1/4 floppy disks that were actually floppy. Yes, I know there are 8" floppies but those were mostly business use and specialized drives that you didn’t really get in the home computer market. Atari, Commodore, Radio Shack, etc all had 5 1/4" floppy drive, and when I got my first box of floppies, it was $50 of early 1980’s money for 10 disks. And on my Atari they held about 90K wroth of space.