My first computer was a Kaypro II in 1982. Still works.
I’ve kept the 5.25 disks (3!) for the FORTRAN Star Trek game used late at night on the company Digital-PDP 1100 in 1981.
They have probably succumbed to redox-erosion by now but...history fades slowly from the mind.
>>Ooh! Double-sided! Aren’t you lucky.
That’s only a single-sided floppy. You have to notch out the other side (near the label) with a hole punch, without actually notching the disk itself, to make it double sided. :)