USB (Universal Serial Bus) is a standard interface used for connecting devices to a computer or other electronic devices. It provides a simple and efficient way to transfer data and power between devices. A flash drive, also known as a USB flash drive or thumb drive, is a small, portable storage device that uses USB technology. It allows you to store and transfer data such as files, documents, photos, and videos. Flash drives are convenient and widely used for their compact size, large storage capacity, and ease of use.