Usb 20 stick memory size 64 gb read speed 18 mbs write speed 5 mbs backward compatible with usb 11 memory types flash memory nand flash material plastic series toshiba transmemory manufacturers warranty 5 years weight 8 g additional information read and write speed may vary depending on the capacity compatible operating systems windows 2000 windows xp windows vista windows 7 windows 8 mac os 10 fastener with cap colour white