A few days ago I put my 16 GB SanDisk Memory Stick Pro Duo in my PSP and it couldn't be read. The PSP CAN NOT read or format the 16 GB stick. My computers DO at lest detect it although they ask to format and when the program comes out . The top box has "238 MB". Strange. http://imageshack.us/photo/my-images/801/formaterror.png/ When trying to format (by use of CMD): http://imageshack.us...3/sandiskd.png/ I think I bought a damn fake stick. It worked since June to last week. Bought on Amazon. Seller: Straight Trading, Inc. via Amazon Fulfillment Return or other? If I could at lest get the $ back I could probably buy a stick off newegg . . . . I should also mention that my 8 GB stick (from Sandisk as well) can be read and I use that for music although I think I bought that from newegg.