How do I make a .txt, that contain all the data of a map

Hello!!! I want to make pressing a button open a text box, then put the name of the map, then press a button and the map will be saved in .txt, somewhere in the internal memory, please help I am beginner

(Sorry for my English)

You can use a text box which allows input and save that to a global variable set to text.

You can save that using the save and load system commands or using local storage.

Look in the tutorial section for text box and local storage and save and load commands.