Have the card for use in a GoPro Hero3 Black bought. In Protune mode in which with 45 MB / s accessing the card, the recording stopped after a short time again. It turned out that the card probably does not create 45 MB / s, although clearly on the packaging the words' up to 48 MB / s " Thus, it is the usual Misleading "to" statement made! Only the purchase of a Transcend card comparably priced, brought Remedy. Will not buy Samsung SD cards more.