I cant set up the permissions/ i dont have AndroidManifets.xml

I wanted to read users data like images to use it in the game. This needs to the user can set up own pictures. But there is a several problems to me. I know that i need permissions to read and write data and i need to set those permission into the AndroidManifets.xml, but i dont have it. Insted i have LauncherManifest.xml and UnityManifest.xml. Which one i should use to set up my permission.

Simply create your own AndroidManifest.xml in yoour project and unity will mix it with its own manifest. The permision for reading and writing data can be set in the

project settings > player > other settings > write permission 

and unity will automatically add them to the manifest