NOTICE: Micro SD Cards/Flash Drives/Memory Cards; Manufactures conform to the SI prefix definition. Computers uses the binary definition (and other devices like card readers, cameras, phones) interpret Memory Card Sizes differently. It is not the purpose of this Shop to explain the maths. Card defects also give rise to misrepresentation. Google search the subject if you need more technical information. If you're not pleased with your item, please return it to us for a full refund. We offer an Unditional Gaurantee 30 days money back. Tatally risk free shopping!