this is just a tip on what would be a recommended SD card that will play games like castlevania and games will not load or freeze. slow memory sticks will not run all games with 100% compatibility so it would be ideal to get a 6 class SD card Speed Classes: The following are the ratings of some currently available cards: * Class 2: 16 Mbit/s (2 MB/s) * Class 4: 32 Mbit/s (4 MB/s) * Class 6: 48 Mbit/s (6 MB/s) * Class 10: 80 Mbit/s (10 MB/s) it is recommended to get a 6 class or higher card for full compatibility with stable speeds on roms transcend and kingston are good cards.