The Western Digital WDBFTM0040BBL-WESN is a 4TB WD My Passport Ultra portable hard drive in blue, featuring USB-C connectivity with up to 5 Gb/s transfer speeds and backward compatibility via an included USB-C to USB-A adapter. This drive comes preformatted for Windows, includes WD Discovery software with Acronis True Image for backups and ransomware protection, and offers hardware encryption with a user-set password and 256-bit AES encryption. It measures 4.33" x 3.21" x 0.83", weighs approximately 0.51 lb, and is crafted with over 50% recycled materials, backed by a 3-year limited warranty.