Removing maps from the 700 before I returned it was easy---Google how, it's pretty trouble free. I think I used Garmin's online instructions. In my research, I came across a few warnings that when a map is sold as pre-installed on a unit, the map cannot be 're-located' to another GPS unit or memory card. Delete, yes, they said...save and move somewhere else--- possibly not. Subject for further research.The only issue I have had so far is moving the street maps that came with the unit to my SD card. I use Garmin Express to do this and it takes about an hour, but when I disconnect the GPS and then re connect it, the maps are still located on the Internal memory. I am also trying to figure out how to delete or move the south american topo maps since I will never use them.