Updating maps on mapsource
Due to the GPS limit of 1MP on a map size, the largest untiled map you should export is 1024x1024 pixels.
Untiled exports are useful for small areas, and for true "what you see is what you get." Luckily Topo Fusion lets you export large areas of maps using the Tiled KMZ Export.
Yes, these devices can be updated however it is problematic if you want to update full European maps.
The devices can only accept class 4 SD cards up to 2 GB.
Often (but not always), at three years the battery in the sat-navs start to deteriorate and as the lifetime map updates are not transferable to a new device, sometimes it can be more cost effective to replace the sat-nav with a new device rather than update it.
You buy a micro/SD card preloaded with the Ireland/UK maps, you insert it into the side of your device and off you go.
If all goes to plan, not only will the latest maps for your sat-nav be installed but also the latest device software, Bluetooth updates, voice updates and so on. Register your sat-nav by entering your email address when requested to do so. I recommend that you only use Express if you have a good and reliable broadband connection as some of the maps files are very large and take several hours to download from Garmin. During the update procedure and depending on your device, you may be asked to disconnent your sat-nav from your PC and reboot it (turning it back on).
At the end of the process your sat-nav will be right up to date. This step is the installation of the latest software (not the maps) for your device.
In these cases, even though your device comes with lifetime maps, no matter how many times you connect your sat-nav to Garmin Express it informs you that can purchase a map update.
If this happens, you will need to contact Garmin on 1890 930 081 to have the problem resolved. The only difference is that you have to purchase the map update from Garmin's website first and then use Express to apply the update.