This is not a Divi library item pack! I exported all layouts from pages, with Visual builder’s portability function. You can import the selected layout directly onto the page or post with Visual builder.
Step by step guide:
1. Unzip the zip file on your computer.
2. Create a post or page.
3. Enable the Visual Builder.
4. Import the .json file onto the post/page with Visual Builder.
5. Wait patiently while JSON file is being imported.
https://www.elegantthemes.com/documentation/divi/library-import/ (Read this section: Importing Individual Divi Layouts)