WD My Passport Portable Hard Drive palm size, which makes it an efficient storage solution for people on the go. It is compatible with Windows 7, 8 and 10 operating systems. For use with other systems, reformatting is required. The hard drive is fast and efficient, and it even boasts a reimagined attractive and capable design. The My Passport Hard Drive is quick and easy to use. Just remove it from the box and plug its USB connection into your external device.