24x1.44MB 3.5" floppy diskettes.

Tested a few months ago and I could read them from a USB floppy drive on Windows 11, but let's be realistic:

They're old--close to 30 years old at this point--and we know that these things weren't all that reliable when they were NEW! At least the cases are in pretty good shape considering their age. I've got a lot of 10 disks with cases available as well--just check my store!