Guys be very careful of the Micro SD cards you buy off of eBay and Craigslist. I can confidently say that more than half of them are probably fake. I recently bought one off of eBay for a 40 bucks and it was a 64 gb Micro Sd Card. I put it in my phone and noticed that it kept unmounting on me and had atrociously slow data transfer/read rates. Also pictures would not save onto it and the ones that did save would not open after. Upon further inspection and thanks to this guy: https://www.youtube.com/watch?v=IXuxOnHgs0c , I found that the one I bought on eBay was fake and demanded a return right away. So just watch out. You can also use this program to detect counterfeit or real by testing the specs of the storage unit you bought: http://www.softpedia.com/get/System/System-Miscellaneous/H2testw.shtml