SanDisk ultra USB 3.1 pen drive lets you transfer files 15 times faster than a USB 2.0 device. with up to 150MB/s read speed you can quickly back up your files so you don't have to wait. A built-in safeTM security software encrypts and protects your important files, safe and reliable, without fear of privacy leaks. The SanDisk pen drive is an all-metal housing design, sturdy and durable, always protecting your important document.