I cant find fortnite in my files

in Graphics where you can choose your apps for high performance and power saving and more, there is a browser button that shows all of your files. I pressed that and I couldn't find the game I play which is Fortnite in my files even though i can play it and open it, when I close my file and open a new file it's there, I try to move it to the other file which is when I pressed bowser in the graphics setting but it won't let me I hope you guys can fix the issue that is dealing with thanks.

:)