Android "Use ExternalFilesDir for UE4GameFiles" makes SaveGame files invisible to user

When “Use ExternalFilesDir for UE4Game files?” is unchecked, and I have requested necessary Android permissions (READ_EXTERNAL_STORAGE and WRITE_EXTERNAL_STORAGE), the SaveGame files ARE visible in /UE4Game/[project_name]/[project_name]/Saved/SaveGames/, but ideally, I would like the SaveGames to be erased when the app is uninstalled. When “Use ExternalFilesDir for UE4Game files?” is unchecked, the SaveGame files do not get erased.