256GB Micro SD Card High Speed TF Card Class 10 256GB Micro Memory SD Card for Camera,/Android Phones/Tablets(256GB)

About capacity: 128GB=approximately 116GB-120GB 256GB=approximately 228GB-236GB 512GB=approximately 478GB-492GB This is calculation difference between manufacturer and our PC, please Google 'Memory card capacity' to get more information Protection: Waterproof Temperature Proof Shock Proof X-ray Radiation Proof Feauture:Original high quality flash memory Warm Tips: Our Store offers 100% genuine memory card with 1 years warranty Please use quaity card reader to verify all memory card on PC Please don't use cheap card reader to test memory card, speed of memory card will be reduced by low quality card reader. Memory card speed is greatly affected by card reader, adapter, USB port etc. Low quality device will 100% slow down card speed. Up to 40MB/s read speed; write speed lower. Based on internal testing; performance may be lower depending on host device, interface, usage conditions and other factors. 1MB=1,000,000 bytes.