You can add content by clicking the "Add To Cloud" button.
Click on one of the sample models, then "Next", "Next" again, and then "Done".
Wait for the model to upload and appear in the Content page.
Use the search bar to find free 3D models that you can instantly add to the console.
You can find additional free 3D models on Google Poly, Sketchfab, TurboSquid, Sketchup's 3D Warehouse, Clara.io, and Archive3D.
You can create your own 3D models with Tinkercad, Blender, Fusion 360, MagicaVoxel, Maya, Maya LT, and Maxon Cinema4D.
Learn more about the types of supported 3D content (e.g, models, videos, and image) here.