Hard Disk Drives

A hard disk is a circular metal disk coated with magnetic material and usually sealed in a hard disk drive inside the computer.

Some hard disk drives are not permanently fixed inside the computer but are removable.

Data stored on a hard disk can be accessed much more quickly than data stored on a floppy disk.

Hard disks can store much more data than a floppy disk. A typical hard disk inside a personal computer can hold several gigabytes of data.