If you already use an SD card with the Miyoo Mini, we recommend backing it up just in case and then removing all of the older files. You may need to reformat the SD card if it's not already in FAT32 ...
The Miyoo Mini was a bestseller when it was released in 2022, but the tiny, GameBoy-style retro game emulator quickly sold out and was often unavailable to buy for weeks, if not months.