Firmware power management issues or dying controller batteries.
If your current card still functions, copy the resources , roms , and download folders to your PC. This ensures you do not lose your game library or save files. Step 2: Format the MicroSD Card Insert your new MicroSD card into your PC. Open . Select your card's drive letter. Choose FAT32 as the file system and click Start . Step 3: Flash the Firmware Image Open BalenaEtcher or Rufus .
What (Windows, Mac, Linux) are you using to flash the card? Share public link