I bought two of these from a major electronics retailer to make sure I don't get a bootleg one and they both crapped out on me. I usually buy from amazon but I needed them rig away . So unless that company has bought a large batch of bootleg cards or maybe I'm retarded. I bought them from the same store but different locations. I have switched brands now. Not taking anymore chances just in case a flood of bootleg ones hit the retail chains too. It worked fine at first but as the card filled up both times, both times they died and my pc or phone couldn't reformat it or recognize it. Good luck if you buy this major name brand, I thought they were the best too but not for me I guess.