256gb pen drive usb flash drive 128gb stylish pendrive metal case memory stick disk f60/f70/f80

features: 1. metal case. 2. small size, very portable. 3. using domestic udp technology. safe. waterproof and shockproof. take out and dry immediately after dropping into the water. 4. usb 3.0 port design. 5. convenient to take, easy to use.6.instantly expand device capacity. plug and play. easily solve the memory shortage problem. 7.effectively save file transfer time and greatly increase work efficiency. 8.supports external storage extensions, for all computers and most tv, car, and loudspeaker box..syi