Features:Supports hot plug & play, High speed USB 2.0 portNo physical drive required Plug-and-play; no external power supply required, USB bus-poweredSupport all current computer systemsSpeeds vary depending on types of file being transferred and computer configuration.Read Rate: 12-18 Mb/S    Write Rate:4-6 Mb/SInterface USB 2.0Excellent USB Memory stick in excellent conditionAbout capacity:4GB=approximately 3.6GB-3.8GB8GB=approximately 7.4GB-7.6GB16GB=approximately 14.4GB-14.8GB32GB=approximately 28.5GB-30GB64GB=approximately 58.5GB-60G Vendors are using Flash memory decimal arithmetic: 1 MB = 1000KB, 1G = 1000 MBCalculated, operating system with binary arithmetic: 1 MB = 1024KB, 1 GB = 1024 MB;So there are some differences between display capacity and nominal capacity of flash memory productsPackage included:1 X USB flash driveWarm Tips:1. To avoid data loss or mechanical damage, do not power down your computer or unplug flash disk during transfer2. Please do not remove your USB flash drive when it is being used otherwise your data may loss.3. After using USB flash drive, it is better to remove it as soon as possible. That will helps to extend its storage lifetime.4. Please do not format your USB flash drive frequently, otherwise the USB will be damaged easily.