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A hard disk is the component of the computer that contains the data. Each team needs at least one hard disk to store the operating system, programs and user information. This unit is usually internal, however, as computer systems have evolved and their different needs, threats and some circumstances that have arisen over time, Additionally the external hard drive has become extremely popular. The Internet regularly exposes computers to many potential security threats, such as spyware, viruses, and Trojan horses. It has become increasingly difficult to protect against these threats, even with the use of firewalls and anti-virus programs. Apart from online threats, several members of the same family often used the same computer, putting the important documents of the system at a higher risk of accidental corruption or loss. In addition, the necessary space for multimedia storage has increased with MP3s, recording DVDs, streaming videos and high resolution photos files they take up large amounts of space on your hard disk. All these concerns can be solved with one simple answer: an external hard drive.

An external hard drive can be found beside the Tower of the main computer on the outside. The coating is slightly larger than your own hard disk, since times contains a cooling fan. This portable solution allows you to store information on a hard disk that is not inside the computer, but it is over a table or surface next to the computer. The external hard drive this connected to the computer via a high-speed (type of network) interface cable. Interface cable allows the external hard disk can communicate with your computer so that data can be passed from round-trip. The most common types of USB and Firewire interfaces. A laptop or external hard disk is a very useful piece of equipment.

Allows the user to perform backups or store information important, separated from the main internal hard drive, otherwise you might be exposed or compromised by activities online or offline. Important documents, large music files, DVD images, movies, images from disk, and even a backup of the contents of your main internal hard drive, all can be maintained safely and with more security on an external hard drive. When you are online, you can even turn off the external unit to remove it. Original author and source of the article