If you have different countries/regions in your ride command, updating the US maps with the latest one will delete the other countries' maps. For example, my RM came with the North America map. I purchased and downloaded the European map for my three-year sojourn in Germany. Over the winter, I downloaded the latest North American map to take advantage of my three years of free updates. After sitting through the lengthy update and install process, I discovered that my EU maps were gone. I am now in the process of re-downloading and re-installing my EU maps.