Short answer: It's flash memory and it works. Pros: -My Sony PSP does say it supports MagicGate (which research tells me should mean it is not likely a fake, although that problem may be limited to Sonys). -It came with a Sony Memory Stick Duo Adaptor separately (MSAC-M2). Cons: -Despite the picture and description of the red SanDisk 4GB Memory Stick Pro Duo for PSP (gaming model SDMSG-4096-A11), I received the purple 4GB model (SDMSPD-4096-A11). -It is not high speed (Mark2), if your device can take advantage of that feature.

It was exactly what I wanted and it arrived right on time. I love shopping at overstock.

works fine I enjoy it. The mem Stick is easy to use and works with no problem..