I had an 8GB Transcend class 6 card, and bought a 16GB class 10 Transcend card. Don't bother (unless you need the space). There is no speed difference in writing or downloading to a computer. I did some Googling (after the fact) and it seems the Transcend Class 6 card was actually a fast card for it's time with some conjecture that it was class 10 speed before they changed the label. I guess I could have saved a few bucks and just gotten a 16GB class 6, then. Oh well, it was only $20. Just thought I'd share, in case anyone else uses Transcend, and was looking for an "upgrade."