Updating the Software Using a USB Flash Drive and a Connected Garmin Chartplotter
Before you update the software, you must load the software update files onto a suitable USB flash drive either manually (Downloading a Software Update Manually) or by using the Garmin Express™ app (Downloading a Software Update using the Garmin Express App).
Do not turn off the stereo or disconnect the power during a software update. Turning off the power during a software update may cause the stereo to become unresponsive.
NOTE:
The stereo may restart a few times while updating the software. This is expected behavior.
Parent Topic: Network Update Options