Data storage devices are hardware components used to save digital information. Common types include hard disk drives (HDDs), solid-state drives (SSDs), and USB flash drives. These devices allow users to store files, applications, and operating systems for easy access and retrieval. Data storage devices vary in capacity, speed, and durability. HDDs typically offer larger storage at a lower cost, while SSDs provide faster data access and are more resistant to physical damage. Cloud storage is another option, allowing users to save data online, making it accessible from anywhere with an internet connection.