What is the purpose of the AmpliFi router's USB port? Updated September 01, 2019 22:33 The USB port on the back of the AmpliFi HD and Gamer's Edition routers is reserved for future use and is currently NOT active. We're sorry to hear that! Please tell us why Not now, maybe later Related articles Does AmpliFi have a firewall? Which AmpliFi model is best for my home? Does AmpliFi have a web interface? Firmware Release Notes Will AmpliFi replace my modem?