Usb 30 stick its round shape enables you to easily attach the key to your key ring memory size 64 gb read speed 55 mbs write speed 10 mbs encryption 256 bit aes backward compatible with usb 20 memory type flash memory material aluminum series philips circle series special feature pressure resistant additional information read and write speed may vary depending on the capacity compatible operating systems linux 24 mac os 10 mac os 10 windows 7 windows