As of 2015, the Garmin C330 GPS device can be updated using software downloaded from the Internet, but still requires it to be connected to a computer. The update is done through a USB connection by using a program called WebUpdater that is designed to be used with Garmin GPS.
Prior to downloading the latest Garmin C330 GPS device software, a user must first agree to the WebUpdater's terms and conditions. The WebUpdater program is then installed on the computer, after which it attempts to detect any connected Garmin GPS device. Once a device is found, the program prompts the user to update the GPS device to the latest available version of firmware software.