My own personal preference after many years of sorting is States for US, Provinces for Canada, and Countries stand on their own, although I did id my Ireland LHS by County. Lot easier to find my photos this way for me. Works just fine for LighthouseFriends.com too. I do other breakdowns within states like in NY LI of course, HR Hudson river, LC Lake Champlain, and other Great Lakes with their initails. Allows me to recall where they are and where I was easily. 500+ Lighthhouses & lightships.