:Connect your Garmin device or an SD card to your computer. Ensure there is a folder named "Garmin" in the root directory. If it doesn't exist, create it.
Ensure "City Navigator 2020" (or the specific clip name) is checked/enabled. CN 2020 CLIPS.7z
Go to > Map & Vehicle > myMaps (the path may vary slightly by model). :Connect your Garmin device or an SD card to your computer
:Copy the extracted .img file(s) into the Garmin folder. CN 2020 CLIPS.7z
:Use a utility like 7-Zip or WinRAR to extract the .7z file. You will likely find one or more .img files inside (e.g., gmapsupp.img ).