All Products are 100% Authentic, Original Authorization, General Agent Directly Supply.
About Speed: 16GB U1 Class10 Speed == Max Rread speed to 98MB/s = SDHC 32GB U1 Class10 Speed == Max Rread speed to 100MB/s = SDHC 64GB U3 Class10 Speed == Max Rread speed to 100MB/s = SDXC 128GB U3 Class10 Speed == Max Rread speed to 100MB/s = SDXC 256GB U3 Class10 Speed == Max Rread speed to 100MB/s = SDXC How to Verify the Capacity and Speed of the Memory card? 1). Please use quality USB 3.0 card reader to verify all memory card by H2 testw on PC. Real memory card should pass H2testw with no error. 2). Please don't use cheap card reader to test SD card, speed memory card SD card will be reduced by low quality card reader. 3). Memory card speed is greatly affected by card reader and the capacity you choose , USB port ect. Low quality device will 100% slow down card speed. About Capacity: 32GB=Approximately 28GB-30GB 64GB=Approximately 58GB-60GB 128GB=Approximately 115GB-119GB 256GB=Approximately 230GB-238GB Vendors are using Flash memory decimal arithmetic: 1 MB = 1000KB, 1G = 1000 MB Calculated, operating system with binary arithmetic: 1 MB = 1024KB, 1 GB = 1024 MB; So there are some differences between display capacity and nominal capacity of flash memory products.
