What is a USB port primarily used for?

The USB port is primarily utilized as a high-speed serial port that enables multiple connections for various devices. This versatility is one of the key features of USB technology, allowing it to support different peripherals such as keyboards, mice, printers, and external storage devices through a single standardized interface. USB ports facilitate communication and data transfer between devices at high speeds, which is essential in today's technology environment where quick data exchange is crucial.

The ability to connect multiple devices can also be expanded through the use of USB hubs, further showcasing the USB port’s multifunctionality. This standard has become ubiquitous in computing and consumer electronics, leading to its widespread adoption.

Other options are less aligned with the primary function of a USB port. While it can provide power to connected devices, that isn't its main purpose. Transmitting data specifically to a network router does not encompass the broader array of devices that can be connected via USB. Additionally, while USB ports can be used for storage devices, the term "storing data" implies a single function rather than highlighting the broad connectivity aspect that USB ports are primarily known for.