• SharePoint
    • Site Collection  
      • Lists
        • List (with inherited permissions)
          • Items
          • Columns
          • Content Types
          • Views
          • Permissions (link to parent Site Permissions folder)
        • List (with unique permissions)
          • Items
          • Columns
          • Content Types
          • Views
          • Assignments
        • List (with an item that has unique permissions)
          • Items
          • Items permissions
          • Columns
          • Content Types
          • Views
          • Permissions (Link to parent Permissions folder)
      • Document Libraries
        • Document Library (with inherited permissions)
          • Content
          • Columns
          • Content Types
          • Views
          • Permissions (Link to parent Permissions folder)
        • Document Library (with unique permissions)
          • Content
          • Columns
          • Content Types
          • Views
          • Assignments
        • Document Library (with an item that has unique permissions)
          • Content
          • Items permissions
          • Columns
          • Content Types
          • Views
          • Permissions (Link to the parent Permissions folder)
        • List Template Gallery (this is document library where templates of the List and Document library are saved)
        • Solution Gallery (document library where templates of sites are saved)
      • Site Content Types
      • Site Columns
      • Permissions
        • Groups
        • Assignments
        • Permission Levels
        • Site Administrators
      • Sub-Sites
        • Sub-Site (with inherited permissions)
          • Lists
          • Document Libraries
          • Site Content Types
            • Link to parent Site Content Type folder
            • List of own Content Types
          • Site Columns
            • Link to parent Site Columns folder
            • List of own Site Columns
          • Permissions (Link to parent Site Permissions folder)
          • Sub-Sites
        • Sub-Site (with unique permissions)
          • Lists
          • Document Libraries
          • Site Content Types
            • Link to parent Site Content Type folder
            • List of own Content Types
          • Site Columns
            • Link to parent Site Columns folder
            • List of own Site Columns
          • Permissions 
            • Assignments (permissions for the site)
            • SharePoint Groups
            • Permission Levels
          • Sub-Sites

We backup all default Document libraries and Lists of the Site
Note
: The hierarchy can go even further - there can be sub-sites of sub-sites, etc. 

  • Sites (Legacy) - formerly called Sites. This is only available for users who had this enabled in versions older than 2.0. This checkbox will eventually be phased out (est. early 2020).
    • Document Libraries of Classic Sites
    • Document Libraries of Communication Sites

Currently, we do not back up:

  • Personal Views of Lists and Document Libraries
  • External Lists
  • Web part page types of Site Collections