What is the purpose of a USB flash drive?

@giles.heathcote 

The purpose of a USB flash drive is to provide portable and convenient storage for digital data such as documents, photos, videos, music, and other files. It allows users to easily transfer and store data by connecting the flash drive to a computer or other compatible devices through the USB port. Additionally, USB flash drives are often used for backup and data transfer purposes, as well as to carry digital files between different computers or locations. They are known for their small size, durability, and compatibility with various operating systems.