A star so this comment is seen by buyers disappointed the price of official maps in order to offer them an alternative.
Know that you can use the free cards openstreetmap, what I do for almost 5 years.
In Google search for "garmin gps Bonifas." On the site, choose between routable map (calculation possible routes) or topo map with contour lines and follow the installation instructions.
Alternatively, search for "Free maps for Garmin brand GPS devices". The site, in English, offers all the maps of the world as a free download. A manual helps you in the use and installation. These cards will give you all the details as IGN 1 / 25000ième, far from it, but a valuable and free assistance (by the way, thank you to the volunteers who are involved in this global project).
In general, hikers load their routes on the GPS before their outputs. There are free online tools such as Openrunner etc ... to prepare files in GPX format.
Good walks ... Sincerely, a Garmin GPS user.
