You can reformat your memory card by inserting it into your PS2, and loading your MAX Memory software which came with the card, or as a part of Action Replay MAX. Now highlight the card in question in the browser, and press `Square` to reformat the card. If you haven`t got a MAX Memory disc or a copy of Action Replay MAX, contact our support team at support@datel.co.uk
Remember, this deletes all files on your memory card, so back up any saves you want to keep.