SanDisk SDCZ880-256G-G46 Extreme PRO 256GB USB 3.1 Solid State Flash Drive

Super-fast solid state performance, read speeds of up to 420MB/s; write speeds of up to 380MB/s Sophisticated design with durable aluminum metal casing SanDisk Secure Access software included for 128-bit AES file encryption and password protection Backward-compatible with USB 3.0 and USB 2.0 ports.
Dimensions: 11.0 x 21.0 x 71.0 mm; 0.45 x 0.84 x 2.79 inches Backed by a lifetime limited warranty
Size: 256GB With write speeds of up to 150MB/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 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.