Trying to import a .umap file but it wont show up in the engine

Trying to import a .umap file from a game i own, but when i copy it into “MyProject/Content/StarterContent” the file doesn’t show up. The game runs on the 4.11 version, and the current version I am using is the newest 4.12 build. No error is given, it just doesn’t show the file. Any help would be greatly appreciated!