Features: 1.Plug and play without driver needed, compatible with most USB devices such as mobile phones/computers, etc. 2.Carefully manufacturing metal texture, beautiful appearance and convenient to use. 3.Mini compact U disc and come with key chain, convenient hanging on your keys and not easy to lost. 4.With micro USB adapter, convenient storage files, photos, videos, etc., direct reading and copying. 5.USB 2.0 design, the maximum write speed is 4?10Mb /s and the maximum read speed is 10?20Mb /s. specification:Item Type: U Disc Material: Metal No need for driver (for Windows98 and above) Support for Windows98 / ME /2000/ XP / for OS X and Linux2.4.x Interface: USB2.0 Computer: PC, for OS X PC or laptop, etc. Speed: Maximum write speed is 4-10Mb /s, maximum read speed is 10-20Mb /s Applications: Backup files, videos, etc. Operation Steps: Plug and play Display capacity and nominal capacity are different because the calculation method is different Manufacturer's Standard: 1GB / 1000MB / 1MB = 1000KB Regarding available capacity: Please note the memo regarding storage capacity: 4GB = About 3.4GB-3.8GB 8GB= About 7.4GB-7.6GB 16GB=About 14.5GB-15.5GB 32GB=About 28GB-30GB 64GB=About 58GB-60GB 128GB=About 119GB-124GB 256GB=About 249GB-250GB 512GB=About 498GB-500GB PackageList: 1 x U Disk 1 x Micro USB Adapter 1 x Key Chain