If you have all of Europe on a 2Gb CF card and you ask the PC to download 1b of maps, then the PC / GPS will follow your request and delete the 2gb of information.
So when / if you download, don't tick the maps unless you want them replacing. Just like if you don't want to send any routes or waypoints or tracks
BTW I have one file that is the only one with a mapset, so I shouldn't fall into the above problem. But I haven't tested it because I can't be bothered to
So when / if you download, don't tick the maps unless you want them replacing. Just like if you don't want to send any routes or waypoints or tracks
BTW I have one file that is the only one with a mapset, so I shouldn't fall into the above problem. But I haven't tested it because I can't be bothered to