Explanation:
A USB flash drive is a portable storage device that can be used to save files. It allows users to transfer and store data, such as documents, photos, videos, and more. Unlike traditional storage options, like hard drives or CDs, a USB flash drive is small, lightweight, and easy to carry around. It provides a convenient way to backup important files, transfer data between devices, and access files on the go. Therefore, using a USB flash drive for saving files is a practical and common application.