By default all garmin maps have the name gmapsupp.img, to prevent installed maps being overwritten by updates rename your additional maps to something like Europe.img etc etc.
They must though be placed directly in the Garmin directory either on the device internal memory or preferably on an add in micro sd card.
By default all garmin maps have the name gmapsupp.img, to prevent installed maps being overwritten by updates rename your additional maps to something like Europe.img etc etc.
They must though be placed directly in the Garmin directory either on the device internal memory or preferably on an add in micro sd card.