The hard drive in a computer is also called the hard disk, hard disk driveor fixed disk drive.
Most computers have one hard drive located inside the computer case.
If a comuter has additional hard drives, they are called drives D, E, F, etc. A hard drive light goes on when the computer is using the hard drive. The computer should not be moved when this light is on. The hard drive magnetically stores data on a stack of rotating disks, called platters. The amount of information a hard drive can store is measured in bytes.