On which physical part of a hard drive is the data stored?

A.
Platters.

B.
Actuator.

C.
Sector.

D.
Cylinder.

Explanation:
A hard disk platter (or disk) is a component of a hard disk drive: it is the circular disk on which the
magnetic data are stored. The rigid nature of the platters in a hard drive is what gives them their
name (as opposed to the flexible materials which are used to make floppy disks). Hard drives
typically have several platters which are mounted on the same spindle.