How do I save game Data?

Alright well, I’m trying to find a way to Save game data while running the game after building it. Then when I exit the game, like completely close the window. I want it to load up the data where everything was left off and stuff. I guess like, a way to Save the save file inside a folder which holds the game files. I’m not sure how this really works, so srry about the bad explaination.

But, does anyone know how to do this? or sources?

https://unity3d.com/learn/tutorials/topics/scripting/persistence-saving-and-loading-data