Usb 30 stick memory size 256 gb read speed 350 mbs write speed 250 mbs backward compatible with usb 20 memory type nand flash material plastic series kingston hyperx manufacturers warranty 5 years additional information read and write speed may vary depending on the capacity compatible operating systems chrome os linux 26 mac os x 108 windows vista windows 7 windows 8 windows 81 windows 10 fastener with cap colours black red