Full capacity OTG usb flash drive pen drive 64gb 32gb 4gb 8gb 16gb double smartphone external usb stick pendrive usb stick product detail Specification: 1. USB connection，support Hot plug & Play. 2. No external power supply . 3. Support different types of os. 4. Solid State Storage， Shock proof and electromagnetic proof. 5. Write protection switch 6. Durable data storage 7. Fast speed in write/read transfer 8. Hardware Requirement: PC with USB connection，Notebook，MAC 9. Life:>1 million times 10.Capacity:4GB/8GB/16GB/32GB/64GB Tips: 1 Don't operate the files in the USB flash directly. It would better first copy the files to computer to operate and then copy back to USB flash after operation. 2 To extend USB flash's life span， it would better to plug the USB flash drive down after operation asap. 3 Before removing the USB， please delete the symbol on the bottom right of the PC screen to avoid missing files in the dish. 4 Please do not format the USB frequently for it may damage the USB flash.