From my experience, fake PSP mem card, if u take it out from the PSP to load games, when u insert it back in, sometimes the PSP wont be able to read the card contents. Then u'll have to remove the card, reformat it using laptop, then insert it again, format using psp, then transfer data using cable. My solution: never remove it from the psp. Use cable to transfer any data. Fake mem cards oso hav noticeably slower reading speeds too.