I have an Avtex Tourer/Garmin Camper 770 which has worked pretty well over the 5 years since I purchased it. Unfortunately this year I have started to encounter issues with map updates. The issue appears to be that the map updates are too large for the available storage in the device and I have been unable to work out from Garmin's website how to move the maps from internal stiorage to the Micro SD card that is installed and still has plenty of room on it. I would be pleased to hear from anyone who has experienced similar issues with this model of SatNav.
