If you want to have useful models that can be printed with a 3D printer, I recommend purchasing it.
STL (Stereolithography, filesize: 280 MB), OBJ (OBJ, filesize: 364 MB), 3MF (3D Manufacturing File, filesize: 12.7 MB), BLEND (Blender, filesize: 62.5 MB), FBX (Autodesk FBX, filesize: 139 MB)