After the initial setup, most people rarely engage directly with their smart TV. With wireless connectivity, phone apps, and remote controls, there's little need to. Tucked next to the essential HDMI ports, a USB 2.0 port -- likely sitting unnoticed on the back or side panel -- offers more potential than you might expect. USB ports are easy to overlook, but they're a standard feature on most TVs -- and more useful than you might think.