MicroSD Class 10 or not ...

Bon voila, no complaints about lexpédition of AMAZON, product well packaged and fast shipment.
For cons, I will not say much for this micro SD SANDISK. Indeed, had to install it in my GOPRO HD3, but before small flow test to be on the speed writing in Full HD.
And, disillusionment, SD supposedly class 10 (thus writing minimum speed 10Mb / s), who writes 7Mb / s! Not possible, incompatible with my bad camera. For me, this Micro SD is the capacity, but not for the use that I want to do.