Go get
HxD to look at the file or even the entire disk itself.
you never mentioned where these disks came from or what they are. IIVRC, Mac formated floppies are "blind" to Windows PC without special utilities. Worse if it's one of those oddball sizes. Late model Atari's had a ---fouled up beyond all recognition--- up hardware or
Windows ganked their drivers, depends on who you ask. So not only is the formatting usually screwed up, they liked using those weird disk sizes.
Of course, they could be completely different floppies entirely. I honestly can't remember if modern floppy drives can read anything other than 1.44MiB disks. There was 720K and 400-somethingK disks. Wait... Are we even assuming they're the 3.5" disks?
Then there's those Floptical disks no one ever wanted to use and I think they were physically the same size as standard floppies. I doubt it's what you had, but then again, I did run into a guy once in 2000 that was excited to get his hands on a floptical drive. I think he killed himself when he upgraded to the ZIP drives after everyone else got rid of them.
Those disks are probably corrupted by now. Believe it not, those ---smurfy--- little disk boxes actually had a use for something. Most of the disks I stored in cardboard or just stacked on my bookshelf are toast now. The ones stored in those stupid boxes survived. That's not very much porn to lose but it's still annoying. I think I was able to read part of the first file and that was it. Could be the same thing here.
Write them off as a loss and go find an archive to get workable copies if they're that interesting.