I bought this Class 10 SD card for my GoPro 3 Black and it works great! I only recorded with 1080p 60fps with ProTunes and never had any problems. In the past in my GoPro Hero2 it was very picky with the SD card that you use. But so far this card works great. I do not trust the transfer speed test because there are so many factors that change the outcome (card reader, USB version, hard drives, and etc).