@RueNahcMohr @cabel I was wondering on the theoretical capacity too.

Real 5.25 disks could only do 360K-1.2MB.
This would be… a lot worse. (Some oddball ones even worse like 90K for old Atari DOS)

Unless if maybe the drive and all of its capabilities were also shrunk down and somehow still worked too…

At least under 100k. How much less not sure. A lot probably.