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. Flash drives are available in various storage capacities, ranging from a few gigabytes to several terabytes, making them versatile for different needs. These devices are often used for backing up important files, sharing data between computers, or transferring information when internet access is unavailable. Their compact size and durability make them convenient for everyday use, whether at home, school, or work.