Hard disks are the non-volatile kind of storage that retains data even when powered off.Īn introduction to the external hard drive and its encryptionĮxternal hard disk drives are basically a portable device that is used to store data externally. ![]() The data is randomly accessed from the moving actuator arm so that separate bits of data can be kept and retrieved in any order. The platters are usually arranged on a moving actuator arm paired with magnetic heads that read and write data to the platter surfaces. It uses one or more rigid fast rotating platters, which are coated with magnetic material to store and retrieve digital data with magnetic storage. It is an electromechanical data storage device. ![]() A hard disk drive is also known as a hard disk, hard drive, or fixed disk.
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