Craig
I would not recommend this card if your looking for REAL class 10 write speeds. The most I could get is 9mb/s from this card but for the most part it was about 7-8mb/s. I even did a slow format to exfat in windows 7 with no improvements. I copied over music, pics and movies to test it out ranging from a couple of mb to over a gb. The read speeds were pretty good at around 21mb/s though. I popped in a 32gb class 10 transcend SD card and it consistently got 16-18mb/s write speeds and 24mb/s read speeds. So in conclusion I think this card is not really a class 10. Too bad I read all the negative 1 star reviews after the fact but I will be sending this one back.