What is Hard Disk?

[Lucifer12]

Hard Disk(HDD) we can also say that Hard Disk drive. Hard Disk is a circular aluminum plate or glass covered by magnetic material. It is a magnetic storage medium for a computer to store data. It can store a huge amount of information on a single Hard Disk.

[dazzle]

A computer hard disk drive (HDD) is a non-volatile data storage device. Non-volatile refers to storage devices that maintain stored data when turned off.