Specifications: 1.Brand new and high quality 2.Available capacities: 8GB, 16GB, 32GB, 64GB and 128GB 3.Chip: Grade A original brand flash memory chip. Every Piece is under test before shipping 4.Interface Type: USB 3.0 (Backwards compatible to USB 2.0 and USB 1.1) 5.Speed: Writing speed: 30-40MB/S; Reading speed: 70MB/S 6.Durability: Over 50,000 times read and write Important Notice: The actual available capacity for data storage is less than what is listed on the products. As some of the listed capacity on a flash storage device is used for formatting and other functions, thus is not available for free data storage of users The usable space for each capacity is as below: 8GB: with usable storage space of 7.45GB-7.65GB 16GB: with usable storage space of 14.58GB-14.75GB 32GB: with usable storage space of 29.48GB-30.56GB 64GB: with usable storage space of 58.68GB-62.45GBService: Thank you for choosing A Plus+ products! If you are not happy with A Plus+ products, please do not hesitate to contact us. In every customer relationship, A Plus+ strives to be a trusted partner and seeks to achieve 100% customer satisfaction.