With write speeds of up to 150 MB/s, the SanDisk Extreme® Go USB 3.1 Flash Drive lets you quickly copy and go. Up to 35x faster than standard USB 2.0 drives, so you can transfer a full-length 4K movie to the drive in less than 40 seconds. The design keeps the retractable connector protected when not in use, and the included SanDisk SecureAccess™ software provides password protection of your private files while leaving the rest of the drive available for sharing.