A hard disk (also known as hard drive and disk drive) is the component that stores all of the files and software on your computer. Laptops use a 2.5" hard disk and desktop computers use a 3.5" hard disk. Storage capacity ranges from 120GB to 3TB.
A hard disk consists of a number of internal discs coated in magnetic particles that spin at around 7,200 RPM. Each disc surface has an actuator arm with a magnetic head that reads and writes to the disc. |