What is a “hard drive” or a “hard disk drive”?
The term “Hard Drive” (HD) or “Hard Disk Drive” (HDD) refers to the primary data storage device within a computer system. It contains one or more aluminum (or glass) disks that are coated with a magnetic coating. The disks spin at speeds up to 15,000 rotations per minute (RPM), and the read / write heads move across the disk surfaces to transfer data to and from the disks.
