I had this a year or so ago from Amazon on a Black Friday deal. A simple I/O test is usually enough to confirm a fake. The sellers are aware of their stock being fake, full refund without return and reported it to Amazon. Ebay have supporting documentation about finding fakes on their platforms and testing authenticity. [0] http://www.ebay.co.uk/gds/Spotting-Counterfeit-fake-SD-Micro...