What do you understand by a hard disk and how are they classified?

What do you understand by a hard disk and how are they classified?

- Hard drives are usually devices that can be used for storing data and to retrieve it. They are composed of one or more than one rigid disc that rapidly rotates.

- The discs are magnetically coated and use magnetic heads to read and write data on them.

- They are also known as the secondary storage devices used to store large amounts of data.

- They can be classified into the following types : Non-Volatile, Digital, Magnetic or data storage devices.

- Hard drives have been dominant since the use of personal computers as they allow large amounts of data to be stored at low costs and high reliability.