If you purchase a computer today, you will most likely see specifications referring to Hard Drive. The common personal computer has an internal magnetic hard disk on which is stored the operating system, programs, and information data. The device that spins a disk is called a disk drive . Within the disk drive are one or more heads that actually read and write data to the disk. The term hard is used to distinguish the hard disk from a diskette or floppy disk.
Hard disks hold more data and are faster accessing information than diskettes.
Generally, hard disks are less portable than diskettes, although it is possible to buy external hard drives with removable hard disks.