USB Flash Drive Thumb Pendrive 128GB Flash Memory Stick 32Gb 64GB USB Storage Key usb Devices USB Stick Features:Supports hot plug & play, High speed USB 2.0 portNo physical drive requiredPlug-and-play; no external power supply required, USB bus-poweredSupport all current computer systemsspeeds vary depending on types of file being transferred andcomputer configuration.Read Rate: 12Mb-18Mb/S Write Rate: 4-6Mb/SInterfaceUSB 2.0Excellent USB Memory stick in excellent conditionAbout capacity:4GB=approximately 3.6GB-3.8GB8GB=approximately 7.2GB-7.6GB16GB=approximately 14.4GB-14.8GB32GB=approximately 28GB-30GB64GB=approximately 58GB-60GB128GB=approximately 110GB-120GB 256GB=approximately 230GB-250GB 512GB=approximately 460GB-500GBVendors 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 DriveAttention:lTo avoid data loss or mechanical damage, do not power down your computer or unplug flash disk during transfer.lPlease do not remove your USB flash drive when it is being used otherwise your datamay loss. lAfter using USB flash drive, it is better to remove it as soon as possible. That willhelps to extend itsstorage lifetime. lPlease do not format your USB flash drive frequently, otherwise the USB will bedamagedeasily.