How to add existing xml file to project build?

Hi! I have a game with custom map editor, it export my maps to a .xml file. It works if I place a file in Resources folder, and load it with Resources.LoadAll(“Maps”). It works perfectly but… I want to let players create their own maps and attach to a project maps editable for them.

Can you pass me a solution for this problem? How to attach a physical existing xml file after build. I already have an idea that after first run myEditor will export them from resources and save it all in my custom folder. However it will be nice if I have solution to attach files without running the myEditor.

PS
All scripts are in C#, and my xml map files is just serialized custom mapXml class.

After I come home, I’ll try this method and post results: