I have a 945 (with music) and it is using 12.1 GB of space for "other". I assume a lot of that are maps that I will never use. I have plugged in my Edge device into a windows computer and used that to switch out maps so I assumed that the watch would be the same. However, the watch shows up as an unknown device and I can't access it through the Windows File Explorer. There doesn't seem to be any way to delete maps in Garmin Express. Does anyone know how to free up space on a Forerunner 945?