A pendrive, also known as a USB flash drive or simply a USB drive, is a small portable storage device that connects to a computer through a USB port. It is used to store and transfer data between computers, such as documents, photos, videos, and other files. Pendrives are popular due to their compact size, large storage capacity relative to their size, durability, and ease of use. They are widely used for backing up data, transporting files between computers, and as a means of storing and transferring files securely.