For sale: 64MB memory card for PS2 MX4SIO (MX4SIO not included). Please read the description carefully before purchasing. By inserting a microSD card containing game disc data into the MX4SIO, you can play PS2 games without inserting the disc. Please purchase only if you have the necessary knowledge of how to store game data, or if you can gather the information yourself. - 64MB memory card (FMCB + OPL) I have only confirmed actual operation on SCPH-35000, SCPH-39000, SCPH-50000 (SCPH-55000), SCPH-70000, SCPH-75000, SCPH-77000, and SCPH-79000 models, so I cannot guarantee operation on any other models (It seems to work on SCPH-18000, 3xxxx, 5xxxx, and 7xxxx, but unconfirmed). Some SCPH-90000 models (early board?) may work, but there's no way to confirm this. Almost new, only used for operational testing. Price is not negotiable.