I believe that is a typo on the part of the person who wrote that. Send To in Basecamp I believe only is for waypoints and routes, but since I don't have a device that supports either I cannot confirm that. You need MapInstall, which is installed with Basecamp, to transfer maps. In [Only registered and activated users can see links. ] I provide a link to a version of the MapInstall EXE that allows maps to be sent to any drive.