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Flash drives, also known as thumb drives or pen drives, are compact portable storage devices that connect to computers via USB ports. They serve as an external memory source, allowing users to store, transfer and backup files with ease. Flash drives are popular for their small size, large capacity, durability, and high-speed data transfer rates. Compatible with various operating systems, they can be used across different devices such as computers, laptops, tablets, and gaming consoles. They offer convenience and flexibility in carrying and accessing digital files on the go.