wd 4tb my passport ultra usb 3.0 type-c slim portable external hard drive (blue) + compact hard drive case (navy blue) western digital expand the storage on your windows system and back up photos, video, music, and documents using the blue 4tb my passport ultra usb 3.0 type-c external hard drive from wd. this drive is equipped with 4tb of storage and a usb 3.0 type-c interface. if your computer doesn't have a usb type-c port, an included usb type-c to type-a adapter helps ensure compatibility with older systems. this drive is also bus-powered, meaning that all its power is provided by the usb cable and no external power cables or adapters are required.