A storage device in Computer System that stores, and extract data files and objects regardless of power off of the computer is known as “Hard Drive” or “Hard Disk”. Hard Drive usually has a large storage capacity and stores the data permanently until it is deleted manually. Once a data or file is saved in Hard Disk then power off of computer system also doesn’t remove the file until is done by self. Hard Drives are Non-Volatile in nature. There two types of Permanent Storage Device i.e. Internal Storage Device (Hard Disk) and External Storage Device.
External Storage Device is of various types: