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There are times when storing information on your computer's internal hard drive is not the best nor the wisest option. You may need a backup of important information in case your desktop computer's drive crashes and destroys your work or game files. In these situations do not risk overloading your system or losing important data. Instead, turn to the Western Digital My Book Essential 3TB (WDBACW0030HBK-NESN) external hard drive.The device easily connects to any computer or notebook with a USB port. It enables you to swiftly transfer data or media such as movies, music, and important pictures. You don't even have to transfer the backup files. If you would prefer, you can play movies and games directly from the external drive. Keep as much data as you like on this black box. Its 3TB of storage makes it ideal for backing up all the data from your computer. With this much space, you can store around 750 movies, almost a million images, or over 50,000 hours of music and never run out of entertainment options. If you still need more storage, pick up multiple drives for those games and other applications that require additional space.The hard drive is both USB 2.0 and 3.0 compatible. It has a USB 3.0 port on the back of the case. The external drive also comes in the box with a UBS 3.0 to USB 2.0 cable, so you can use it with older model computers. The back of the case also features a convenient On-Off switch. This enables you to leave the powered hard drive connected to your wall outlet without it raising your electric bill when not in use.An additional important feature enables you to set a password for added privacy over your personal data. The security features are already set up on the hard drive. All you have to do is select your login information and the Western Digital My Book Essential (WDBACW0030HBK-NESN) will keep your files safe. This feature is great if you think someone else might come along and try to access it from your desktop.The My Book Essential is compatible with Windows XP, Windows Vista, Windows 7, and Windows 8 software. You can also use it with Mac OS X 10.6.5. If you reformat the device, you'll also be able to use the My Book Essential on later versions of Mac. It has backup software that is compatible with Apple Time Machine. You can even use it to store your Wii U and Xbox One game files. Just hook the 3TB capacity drive up to the Wii U or Xbox and start saving you dataThis super-fast 7200 RPM Western Digital HDD allows you to access media in the blink of an eye. Despite its speed, these external drives are surprisingly quiet with little to no vibration. You can keep one of these drives running right next to your desktop computer without it causing distractions.