Organization of files

Was wondering how Unreal organizes files. As you can see in the attached pic, there are 2 folders named Meshes that Unreal sets up automatically. Why are there 2 folders here with the same name but different contect?

One is in CONTENT …the other one is within A LEVEL:)

It was just when I imported a vrscene into unreal it put a bunch of files that I could see in both columns. On the Content side in the materials folder I got every model and material. I think I will ditch the VRscene and just do obj import.