How am I going to save the game in Final Fantasy 1? How am I going to save the princess?

Sorry for the late reply, but, I'm not quite sure what exactly you're meaning.

By reading your post, I think you have a problem with saving. In the original NES version of FFI, the main place to save the game is in an Inn, which occurs automatically upon paying to stay the night there. If I remember correctly, I think you can also save the game on the World Map, by bringing up the main menu and selecting save, like in later FF games (I'm not sure though, as I haven't played the NES version of FFI for ages!).

As for saving Princess Sara, it's pretty straightforward. After leaving Coneria, keep heading north on the world map until you see a run-down temple. This is the Temple of Fiends. Don't worry, ithere isn't that much that needs to be done in there. There are a couple of treasure chests around in other rooms, with a cloth cap and a tent if my memory serves me correctly, but your target is the large room in the centre. Head inside (ignore the birds), and speak with Garland in the centre. After some famously cheesy dialogue he'll attack you. If you're anywhere beyond level 4, then the battle's a joke. Keep the heat on him, and heal constantly. Then, once he's taken out, you'll free Princess Sara and the game will automatically shift to Coneria Castle, where you can continue with the game!

Hopefully, this has helped.

Anyway, thanks for replying! Because I know how to save this game.
To save the games, rest & save in the Inn.
Well! This topic is concluded! Thank you!