Option for starter kit with all template assets?

Does anyone know where some of the content is downloaded to? I’m digging through the folders but not seeing like the cave, shooter, etc. that I want to migrate materials out of.

Also, do I need to copy them over to the 4.0\Engine\Content folder or the \Samples\StarterContent\Content folder so I can just check mark “include starter content” and just throw everything in?