Fuck being incorrect. Buy an old AKAI sampler and make music from floppy disks libraries, I still do with my S-1100. Wrong answer would be to ritually burn them...don't.
Fill a silicone cube with deepset epoxy, toss that bad boy in. Fill a 2" thick and 6’ tall PVC pipe with epoxy. Let it all dry then affix the epoxy rod to that cube and make a wizard’s staff
This is 98% the right answer, but you drop them somewhere that keeps them intact, and believable enough so that people take them, and spend the rest of the weekend going to thrift stores trying to find an external floppy drive, and the next month trying to figure out how to get their iPhone to mount it.
Just carry one around with you and whenever something important happens or you are about to do something risky, pull it out, press it with your finger and loudly say “Save”.
Edit: Bonus points for carrying a huge cardboard mouse pointer to click with.
Edit 2: I really should read all the replies before starting to type.