u/Due-Sir-6062

I recently purchased a Kaico SC64 and am having issues with the games not saving. I started a run through of LoZ Oracle of Ages and I saved through the in-game menu and it appeared to be working fine. I came back the next day and no matter what I do, I can’t get the game to save progress past that previous save. I have tried multiple times and different methods (save and quit, save and continue, save and continue + reset on my console etc.) but nothing is working. I also updated the firmware as well. I deleted the save file and now I can’t even get a new one to save in the game at all. Anyone else having this issue?