Hard Disk Drive

Similar to the Floppy disk, but using rigid "hard" disks coated with a magnetic layer. Much higher density of data storage and faster reading and writing of data. Can be susceptible to shock (drop) damage. More expensive units built to be more rugged and less susceptible to shock damage are available. Typically hard disk drives are located inside computers. In recent times portable hard disk drives are now readily available and can be plugged into a data jack on the computer (USB, ESATA, FIREWIRE).

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