I have an unknown img file in my main folder. In case it matters, it is D7786000A.img, and it is over 700MB.
How do I find out what it is? Might it be safe to delete it?
If you go and edit an activity, it doesnt matter which one, you can configure the maps... in there you can select the map you want to use. Look for something that you dont recognize or is not listed in Garmin Express when you connect your watch to the computer.
I recognize all the ones that showed up when I did as you specified. It does not appear the one I do not know about corresponds to any that is recognized by the watch.
I also downloaded the img file and attempted to install it with mapinstall. Mapinstall does not seem to recognize it either.
It is a puzzle!