I'm just researching flash cards and MircoSDHC cards, and read about different speeds and classes etc. It's a bit confusing and complicated. I read that TWEWY has problems (what kind exactly?) with some cards. If one buys a Class 6 MicroSDHC (the fastest speed) will TWEWY run normally? Same for the Castlevania games I suppose? I was thinking about an 8GB MicroSDHC, or maybe even 16GB eventually. I may also wait for the new DSi version of the Cyclo, just in case I get a DSi someday (I have a Lite now). I own the actual DS carts of these games, but am interested in having them playably backed up onto a single card. Seems it would be very handy, plus then I can use homebrew software too. Thanks for your help. And this site is really great, so much info here, very impressed.