About capacity: 128GB=approximately 115GB-119GB 256GB=approximately 230GB-238GB 512GB=approximately 480GB-500GB 1TB   =approximately 980GB-1000GB This is calculation difference between manufacturer and your PC, The pursuit of the perfect person,is not recommended to buy. Notice: 1. Small and exquisite, easy to carry. 2. Large capacity, you can store your songs, photos and videos. 3. Wide compatibility, suitable for mobile phones, tablets, car DVRs, cameras, etc. 4. All MicroSD cards are equipped with card adapter + card reader. 5.Other maximum read speed: 30MB/s 6.Maximum write speed: 10MB/s Packaging includes: 1Pcs x 128gb/256gb/512gb/1TB Memory Card 1Pcs x Card Reader 1Pcs x SD Card Adapter