Install a Western Digital My Passport external hard drive on your Windows XP, Vista or 7 computer by powering on the system, connecting the drive to an available port and allowing the system to locate the necessary drivers. The same installation process works on Mac 10.4 and later versions.
Installation of the My Passport external drive requires an actively powered system. Once the system comes on and fully boots, connect a FireWire 800, FireWire 800-400 or USB 2.0 cable to the computer. Place the other end of the cable in the corresponding slot on the My Passport external drive. The system recognizes the addition of a plug-and-play device and searches for drivers in its library or online, based on user settings. When the drive appears with its own letter in the My Computer section for Windows computers or on the desktop of Mac systems, it is ready for use.
Some users with laptops that supply minimal power to USB devices may need to add a power booster cable. This is also necessary if the USB cables used exceed 22 inches in length or users connect the My Passport drive to a USB hub that lacks adequate power for all devices. This accessory does not come with most My Passport models, but it is available for purchase from Western Digital, as of 2015.