Huge file size on a blank project using the "Film" template

Hi Everyone, When starting a project and choosing the “film” template - under the “Unreal Project Browser” - a simple blank project seems to be huge in file size due to the file “Main_BuiltData.uasset” it creates inside the Content folder. It doesn’t seem to be the case if you select the “Games” template. Any idea why, or what this asset is for? Thanks!