INTRODUCTION:

1) MX4SIO (Memory expansion For SIO) is an adapter for the PlayStation2 that lets you connect 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 SD card into the ps2 memory card.

3) The SD/TF card is not recognized by the console directly. Only specially developed homebrew software can access the SD/TF card, although the software is currently in the development phase. If you require any help with this, please get in touch.