all-photography-homepage-layout-pack.json – This is the master file that contains the full layout and all of the sections.
photography-layout-all-sections.json – This is the file that contains all of the section files, but not the full layout.
photography-homepage-layout.json – This file contains just the full page layout.
matching menu settings (folder) – This folder contains screenshots of the menu settings so that you can easily create matching menus via the theme customizer.
All of the individual section files – There is also each individual section as a json file.