Usb 30 stick memory size 256 gb read speed 380 mbs write speed 70 mbs backward compatible with usb 20 memory type flash memory material zinc alloy series patriot supersonic certificatessafety rohs fcc ce weight 219 g additional information read and write speed may vary depending on the capacity compatible operating systems mac os 9 linux 24 windows me windows 2000 windows xp windows vista windows 7 windows 8 windows 10 fastener with cap c