Always have your files on hand with the red WD 4TB My Passport USB 3.2 Gen 1 External Hard Drive. Designed with a slim form factor, it's also available in a variety of colors to suit your style. Aside from its 4TB of storage capacity, it's built with 256-bit AES hardware encryption to help ensure your files are protected, and features USB 3.2 Gen 1 connectivity for fast transfers. It and comes formatted NTFS for Windows 8.1 and 10, but may be reformatted for other operating systems, and connects to your host system using an included micro-USB to USB Type-A cable. Users can take advantage of WD's Discovery and Backup software to help manage and back up their files as well.