3 IN 1 Metal OTG 128GB 64GB Flash Drive USB 2.0 32GB Pen Drives 16GB Memory Stick Gifts Type c Adapter 8GB U Disk 4GB Supports hot plug & play, High speed USB 2.0 port ,OTG port(micro usb,send type c adapter) No physical drive required Plug-and-play; no external power supply required, USB bus-powered Support all current computer systems speeds vary depending on types of file being transferred andcomputer configuration. Read Rate: 12Mb-18Mb/S Write Rate: 4-6Mb/S InterfaceUSB 2.0 Excellent USB Memory stick in excellent condition About capacity: 4GB=approximately 3.6GB-3.8GB 8GB=approximately 7.2GB-7.6GB 16GB=approximately 14.4GB-14.8GB 32GB=approximately 28GB-30GB 64GB=approximately 58GB-60GB 128GB=approximately 110GB-120GB Vendors are using Flash memory decimal arithmetic:1 MB = 1000KB, 1G = 1000 MB Calculated, 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 products Package included: 1 X USB Flash Drive+Type C adapter Attention: 1.To avoid data loss or mechanical damage, do not power down your computer or unplug flash disk during transfer. 2.Please do not remove your USB flash drive when it is being used otherwise your datamay loss. 3. After using USB flash drive, it is better to remove it as soon as possible. That will helps to extend itsstorage lifetime. 4. Please do not format your USB flash drive frequently, otherwise the USB will bedamagedeasily.