spoke with customer service had it replaced 3 times, card had problems all of the times, they were all the time looking for ways to get out of the warranty until they decided i did something which obviously wasn't the problem because it happened 3 times with the previous cards, basically look into other companies that honer their warranties,very sad usually very good cards,they kept saying that Samsung updated the software and they update it in ways that it wont match the Sandisk cards.??