A thumb drive, also known as a USB flash drive, is a small, portable storage device that connects to computers and other devices via a USB (Universal Serial Bus) port. It is used to store and transfer data, such as documents, photos, and videos, making it a convenient tool for both personal and professional use. Thumb drives come in various storage capacities, ranging from a few megabytes to several terabytes. They are often compact and lightweight, allowing users to easily carry them in a pocket or on a keychain. Many people use thumb drives for backup purposes or to share files with others without needing an internet connection.