$2.99 Robot Character 10 Low-poly 3D model by ktkaraj. Available on CGTrader with 499619 polys and 346102 vertices. Check it out on CGHub.
STL (Stereolithography, filesize: 23.8 MB), OBJ (OBJ, filesize: 18.2 MB), 3MF (3D Manufacturing File, filesize: 21.6 MB), GLTF (glTF, filesize: 25.7 MB)