Is it actually possible to download the OSM from only Sardegna (Sardinië) instead of the map of the intire Italy? How can I do that?
Earlier this was no problem, but I don’t find the option to download a region of a country anymore.
Thank you for having interest in this topic.
From Geofabrik you can download subnational areas: http://download.geofabrik.de/europe/italy.html
For specific regions or local administrations (comuni) in Italy there’s also this renewed service: https://osmit-estratti.wmcloud.org/
What do you want to do with the map of Sardegna?
If you’re trying to download a Garmin map, you’re in the wrong place and the answer above won’t help you. See https://forum.openstreetmap.org/viewforum.php?id=26 and note you may be out of luck, as a key person has disappeared.