New member here. First GPS. 66i. My question is. I already have Topoactive America's North 2019.10 installed on my device. When I connect to my computer via Garmin Express it says I have a update for Topoactive America's North 2019.10, it's 7 GB file size and I have 8 GB. Available space on the 66i.. Since I have this map on device already do I still update and will it use an additional 7 GB of storage on my device? If so. Should I wait and try to update to SD card when I get one? Thanks very much.