This item is counterfeit, on opening the box I could instantly see (or not see) the controller chip, it was half the size it should have been and was not visible around the edges of the label. the v-nand chips were also slightly smaller.I contacted Samsung support with my concerns and the serial number, they asked for photos which i sent and the ebay store details. Samsung support confirmed it was counterfeit. Have return number but still waiting for seller to send return label.