Warning to anyone buying Samsung SD cards off of eBay. They are made in Korea, so always check the back of the card (real on the left, fake on the right) :
Fake VS Real - Samsung EVO 128gb microSDXC Card - YouTube
HappyBison.com: tech, research and bison
File:Decapsulated microSD memory card lineup-genuine, questionable, and fake-counterfeit.jpg - Wikipedia