About capacity: 32GB=approximately 28GB-30GB 64GB=approximately 58GB-60GB 128GB=approximately 115GB-119GB 256GB=approximately 230GB-238GB 512GB=approximately 460GB-476GB Warm Tips: How to verify the Capacity and Speed of the memory card? 1). Please use qualit 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. Notice: 1. Our Store offers 100% genuine products. 2. All products are in compliance with the Sandisk official website. 3. Manufacturer's reserve the right, at their sole discretion, to change or modify products. Appearance and packaging design may change without prior notice. 4. We are not responsible for any changes or modifications that manufacturer's make to products.