You'll be asked if you want to save after completing a stage. Press yes when the prompt comes up to save the game.
well i picked up a 3ds and i got the legend of zelda four swords free from the eshop and it auto saves on it so im pretty sure it auto saves
no...
Yes press select and choose save.
I have both the 3DS and DSi versions of 4 swords 25th anniversary, and you Can save, but only after a dungeon, or one of the three doors in the realm of memories or vaati's palace
Two
You can't
Two.
Link save Hyrule.
You can't. Zelda is the princess you save. If you COULD kill her, well, there would be no point of the game at all.
you got to press the select button and hit save on the save screen
No, you cannot.
it automaticly lets you save