Harddisk, also known as hard disk drive (HDD), is a data storage device used in computers and other electronic devices.
Key features of harddisk include:
1. Uses magnetic storage to store and retrieve digital information
2. Non-volatile memory - retains data even when powered off
3. Typically consists of spinning platters with magnetic surfaces
4. Comes in various capacities from gigabytes to terabytes
5. Slower but cheaper than SSD (Solid State Drive)