Like many others I was looking for a quick micro SDHC card. Announced: 30MB / s read, 10MB minimum / s write In the real facts: hardly 18-20Mo / s read only 7MB / s write .... So very disappointed with the product. Can not shoot in 4K, 2K and 1080P with ProTUNE gopro3 activated on a black ... It therefore seems to be the big disparity in card batches, mixed counterfeit? In short unusable in my case or nothing to say about delivery well that unusually long for Amazon (1 week) (Note: product sold and purchased from Amazon 32GB)
