I have a og first gen switch that i have auto rcm enabled, system firmware 8.xx emunand 12.1.0 and 1.2.5 atmosphere. I have 2 256 gb cards id swap between for games, but want to merge the 2 old cards save data onto the new 1tb card. What folders can i copy over? What guide should i follow to upgrade my firmware while upgrading my card to 1tb?