Undertale save system

How do I…
I have searched for an answer here for a while and haven’t found anything so here is the question i need answered:

How do i make a save and load system like in undertale, so how do i save the player data do %appdata%?

I want it to be editable by the players, i know i can just make a save file editor in game but i want people to be able to share their save files

Hi @villagerlama!

Have you made a research in the posts of this forum because it seems an answer had recently been brought for this sort of problem?

A+
Xierra