I have read many negative comments about this product (defective card, copy, etc ...) for me it n is not. the product complies and c is the best value that you can find on the net, it's more a quality product as it is of sanDisk mark !!! I advice everyone to order this product through the official store Amazon which guarantees the original product and super fast service. it must indeed not s surprise to receive a copy of the defective product or when the latter is proposed to quarter the price mm or half .... So caution!