A USB flash drive is a small, portable data storage device that uses flash memory and connects to computers or other devices via a USB interface. It allows users to easily transfer, store, and back up files such as documents, photos, and videos. USB flash drives are widely used due to their convenience, durability, and compatibility with most operating systems. In cybersecurity, they can pose risks, as they may carry malware or be used to exfiltrate sensitive information if not properly managed. Organizations often implement policies to control or restrict the use of USB flash drives to protect against data breaches and unauthorized data transfers.