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A storage device is a piece of computer hardware that stores and retrieves digital information, either temporarily or permanently. These devices, which can be internal or external, are used for a variety of purposes, such as saving files, backing up data, and transferring information between devices. Examples include hard disk drives (HDDs), solid-state drives (SSDs), optical discs like DVDs and Blu-rays, and USB flash drives.

Key characteristics

Volatility: Some devices are volatile, meaning they lose data when power is turned off (like RAM), while others are non-volatile and retain data (like HDDs and SSDs).

Speed: This measures how quickly a device can read or write data.

Portability: Some devices are removable and portable (like USB drives), while others are fixed internal components.

Cost: The cost of a storage device is affected by its capacity, portability, and durability.