# Files & Uploads

Upload Design Grades, Original Grades, Overlays, and add-on files to your projects.

By Raymond

## Articles

- [Understanding project files for Site Intelligence: Learn what Design Grade, Original Grade, Overlay, and add-on files are and when you need them for your project.](https://manual.traceair.net/en/articles/14353645-understanding-project-files-for-site-intelligence)
- [How to upload files and overlays through the Project Portal: Upload Design Grades, Original Grades, Overlays, and add-on files — accepted formats and GIS team instructions.](https://manual.traceair.net/en/articles/14353752-how-to-upload-files-and-overlays-through-the-project-portal)