G'day sky59, welcome to GPSPower. I hope we can help you understand the situation better than Garmin. It's quite true that you would be unable to fit the full EU map + additional files on the unit's 4GB internal memory, however MapUpdater should have prompted you to insert a suitable sized microSD during the update process. I think you should read this thread [i moved your post here from the gimgunlock thread] and then try again to do your Lifetime update for 2016.10 with an 8GB microSD card ready to insert when prompted by MU as shown by the image in initial post [don't insert it until prompted]. If you are then still having trouble after that, post again preferably with screenshots of any error messages from MU.