Dumb Map Question

[Airborne Rifles]

Hi, I hope this is the right place for this question. I have been working on a new map that I was hoping to share but when I tried to go into the file folder to move it to another computer there was no file in the slot where I have been saving my map. I can load it from the editor and the game no problem but when I go into the file folder there is nothing there. Does anyone know what I am doing wrong? Thanks.