How to save widgets after program close in kivy python?

Question

Python

Now I'm doing a chat on kivy. I save data through txt files. I need the widgets, in this case the Label, to persist even after the program is closed. A Label can store a maximum of 6800 characters (I may be wrong), so simply putting all the messages sent before the program was closed in one Label will not work. If the widgets are not saved, can you tell me how to do it differently?

Answer 1

Do not want to look in the direction of json? Well, or just store data on the server.