HI, Something I found quite funny and might be useful for someone buying microSDHC. I bought 8GB Genuine Sandisk MicroSDHC. I also bought 2GB (might fake) Sandisk MicroSD. Put about 1.7GB of games into both card, the transfer speed for HC is faster than the non-HC. I insert it in DSTT and turn on my NDSL, both work just fine. ONE thing I found funny is that when you first run a game, it create a game save then load the game. Guess what, the microSDHC card took longer to create the save than the MicroSD. It also took longer to create the .SYS file for DSTT as well. So the conclusion is MicroSDHC is faster than MicroSD when transfer via USB-PC but slower when writing on DSTT. I also notice, if you insert a MicroSDHC in DSTT, you'll see a small HC logo on the upper screen telling you its a MicroSDHC. From this experience, I think 4gb MicroSD is enough for games.