1:MX4SIO (Memory expansion For SIO) is an adapter for the PlayStation2 that lets you connect TF/SD       cards to the memory card slot.  2:The MX4SIO can not replace a memory card! Since it is only an adapter and not a converter to make an     TF/SD card into the ps2 memory card. 3:The TF/SD card is not recognized by the console directly. Only specially developed homebrew software       can access the TF/SD card, although the software is currently in the development phase (like the OPL).