Load your game and savestate, then use an in-game to save properly to the new card.
: This PC program can scan a RAW backup for "invisible" or deleted save files that standard managers can't see, potentially allowing you to restore a previous save state. Hex Editing save data resident evil 4 gamecube fixed
For those using the Dolphin emulator, save errors are often due to "savestate" conflicts with the virtual memory card. : Create a fresh savestate and stop the emulation. Load your game and savestate, then use an