There are many types of storage devices, each with their own benefits and drawbacks. Storage devices are used to store data and instructions permanently. A storage device is a physical piece of hardware that is used to store data. : 15–16 The central processing unit (CPU) of a computer is what manipulates data by performing computations. Other terms for storage device is storage medium or storage media. But with the invention of transistors, radical changes were introduced in the memory implementation techniques. Storage devices are the computer hardware used to remember/store data. A storage device is one of the basic elements of any computer device. It comes in different shapes and sizes depending on the needs and functionalities. Currently, they are mainly used with the mainframe computers. Some storage devices are universal and can be used with a variety of hardware. What is Storage Devices : In computing, storage device is a hardware which can store data and files. Below are explanations about different storage devices. They are mostly preferred for full backup. Types of Storage Devices. In the storage devices, information or data can be stored temporarily or permanently. List of storage devices. for storing data. After learning the hierarchy of storage, it is reasonable to say that there are 4 types of computer storage devices: primary, secondary, tertiary and offline storage devices. The sequential types of storage devices for computer systems consist of magnetic tapes which are economically friendly besides being compact, reliable and faster data retrieval and storage. It almost saves all data and applications in a computer except for hardware firmware. As for the common secondary storage devices , they can be further divided into internal and external storage devices of computer according to their location, inside or outside of computers or servers. Early computers used delay lines, magnetic drums, William tubes etc. In most cases, any type of file can be added to a storage device. Computer data storage is a technology consisting of computer components and recording media that are used to retain digital data.It is a core function and fundamental component of computers. Storage devices are also called secondary storage devices / backing storage devices / external storage devices or auxiliary storage devices. These devices provided an extremely low access rate. Generally there are two type of Storage Devices exist -Primary Storage devices and Secondary storage device. Depending upon the storage capacity, access rate and volatility, data storage can be divided into primary storage and secondary storage.