speaking of old saves -- I have a ziploc bag of old PS1/PS2/Gamecube memory cards that are 20-25 years old. All my old save files from when I was a teenager.
What do we think the chances are that the files are usable in any way?
At a glance, I’d say there’s a very high chance you’ll be able to recover your save files—especially if your mc have been stored properly (you know what I mean…). In my case, I managed to recover game files from all of my many PS1 mc (thanks to MCRex and my Arduino), even ones that were over twenty years old. As I mentioned earlier, some memory blocks appeared corrupted on original hardware (in the photos I’ve attached, they’re the ones shown in gray).
As for PS2 saves, it seems like you need a specific tool, and this time you’ll have to use it on original hardware. For GameCube, I believe you need to go through a Wii using the same kind of method—but I’m not 100% sure about that, so you might want to double-check yourself.