10-01-2012 03:29 PM - edited 10-01-2012 03:30 PM
I hope I understand you correctly as my french is not in best shape.
If the map you want to purchase is too big for the internal memory you need to install a map zone, see more about it here: http://fr.support.tomtom.com/app/answers/detail/a_
If you have a problem updating yxour device in general, see more here for
Hope this helps