HARD DRIVE

                                                                         HDD

A hard disk drive (HDD) is an internal or external computer component that stores data, such as the operating system, applications, and user files.HDDs are “non-volatile” storage devices, meaning they retain stored data even when power isn't being supplied. The platter and the actuator arm are delicate physical mechanisms, so a solid case covers them to prevent damage under normal use. The hard drive cover will look like a metal box, and it will be clearly labeled as a hard disk drive or HDD. Here's what an internal HDD looks like beneath its metal casing. You can see the spinning platter and the actuator arm, and how they work together to read and write the data upon request.

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