What is the purpose of a USB port?

The purpose of a USB port is to provide a standard connection for various devices, allowing users to plug in a flash drive or other external components. USB (Universal Serial Bus) ports are versatile and widely used for transferring data between devices or connecting peripherals, such as keyboards, mice, and external hard drives. They facilitate easy and quick access to data storage and enhance the expandability and functionality of computers and other electronics.

While USB ports can indeed be used to connect devices like printers or supply power, their primary and most recognized function is for data transfer and connecting external hardware. The other options either narrow the function down too much or focus on specific uses that are only part of the broader capabilities of USB ports.