What is an external hard drive?

A hard drive is a computer component that stores data. Every computer needs at least one hard drive to store its operating system, programs, and user information. This drive is usually internal or built into the computer, but as computer systems have evolved and different needs, threats, and circumstances have arisen, external hard drives have become more popular. External hard drives are often used in addition to internal hard drives to store more data. They also allow the user to put sensitive, confidential or important information on them and then unplug them and store them in secure locations.

An external hard drive can be easily moved between multiple computers.

Physical characteristics

An external hard drive sits outside the computer’s main tower in its own case. This portable case is slightly larger than the hard drive itself and sometimes contains a fan. The external hard drive is connected to the computer via an interface cable, which allows the external hard drive to communicate with the computer so that data can be transmitted back and forth.

Most external hard drives connect to PCs via USB cables.

Because it is necessary

Accessing the Internet regularly exposes computers to potential security threats such as Trojans, viruses, and spyware. It is increasingly difficult to protect yourself against these threats, even when using firewalls and antivirus programs. In addition to online threats, multiple family members often use the same system, putting confidential documents at greater risk of corruption or inadvertent loss. In addition, the space required for multimedia storage has skyrocketed, with digital media files often taking up a large amount of space on a user’s hard drive. All these issues can be handled with an external hard drive.

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External hard drives generally use the same type of magnetic plate to store data as traditional internal hard drives.


A portable or external hard drive allows the user to back up or store important information separately from the main internal hard drive, which can be compromised, damaged or corrupted. Confidential documents, large music files, movies, images and other backup files can be safely kept on an external hard drive. Another advantage of an external hard drive is that it is portable and operates on a plug-and-play basis so that other compatible computers can recognize the drive as a storage device and can be used to access files. A user can easily transfer files from the computer to the portable hard drive or from the portable drive to the computer, or programs can be run directly from the portable hard drive.

External hard drives can be connected to computers with USB cables.

Solid state hard drives, which have no moving parts, start up and operate faster than traditional computer hard drives.

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