I bought two as a back up for my Gopro Hero 3.One from Amazon the other was a gift from BB.Both did not work in my cameras, thinking it was Gopro's new update.Kept getting a SDERRI returned other and it worked with no problem.NOTE to all, there are boot-legged products out there It is hard todetect. But of all the Items I've received from Amazon/Prime and beyondHave been great. I just got stuck with a bad batch.GoPro recommends HX,HC,XC and extreme micro cards.