disk drive

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A hardware device that reads data stored on a disk and writes data onto the disk for storage.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun computing a computer drive that reads a computer storage medium the shape of a disc

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun computer hardware that holds and spins a magnetic or optical disk and reads and writes information on it