SAMSUNG Micro SD Memory Card EVO+ 32GB/SDHC 64GB/128GB/SDXC About capacity: 32GB=approximately 28GB-30GB 64GB=approximately 58GB-60GB 128GB=approximately 115GB-119GB Tips: How to verify the Capacity and Speed of the memory card? 1). Please use quaity USB 3.0 card reader to verify all memory card by H2testw on PC. Real memory card should pass H2testw with no error. 2). Please don't use cheap card reader to test Micro SD card, speed of Micro SD card will be reduced by low quality card reader. 3). Micro SD 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,1MB=1000KB. Features: New EVO+ 32GB U1 Class10 speed == Max Rread speed to 95MB/s = SDHC New EVO+ 64GB U3 Class10 speed == Max Rread speed to 100MB/s = SDXC New EVO+ 128GB U3 Class10 speed == Max Rread speed to 100MB/s = SDXC please test on the USB3.0 reader and USB 3.0 port compute thanks