To download free Garmin Maps on your device, you will need to download the Garmin Express app first. Users can easily download the Garmin Express(for Windows and Mac) from the official website of Garmin.
After that, create a Garmin account, register your Garmin device and go to the settings to explore free map updates(Garmin releases update every quarter). Now, select the update and click on the install tab to download the update on your device.
After the procedure is completed, reboot your device. Now, you can access the latest updates without any stretch.
Read more:- https://gps-map-updates.com/garmin-map-updates/