Stone Shard is a turn-based RPG where every move you make counts, but after you move so do your enemies. You have to stay on your toes, or you will find yourself in a lot of trouble in a fight, especially if you are overwhelmed by a horde of enemies that outnumber you. When death can strike at any corner, it is essential to learn how to save in the game.
You don't want to stop Stoneshard after completing the game. It will lose all of your progress and if you do it too early in the prologue you may have to start over. There is also no save function in the menu, so you can't do it there, and you can't do it freely every time you want to end your game. You must first complete the prologue for a chance to start saving the game, and you have chosen your character.
When you want to save, you have to visit a tavern to rent a room. You have the option of renting it for one day for 30 crowns, one week for 180 crowns and two weeks for 300 crowns. After choosing how long you want to rent the room, go to the right side of the hostel, and you should see the stairs you can go up. You need to switch to a new screen where you should see two available rooms. Pick a room, then get up to bed where you have the option to sleep, and you can choose how long you sleep and when you wake up. You will wake up with the "fresh" buff at the top of your screen.
You have to pay the innkeeper each time you want to rent the room if you want to rent it for one night. However, you can choose to buy a room for a week or two if you know you plan to return within that time. Considering how much you can rent the rooms for, it doesn't make any difference, and you might be better off sticking with renting each night.