Exporting from SolidWorks

Save > Save As > Save as type: 3D Manufacturing Format (*.3mf)

or

File > Save As... > Save as type: 3D Manufacturing Format (*.3mf)

.3MF is preferred, but .STL and .OBJ exports are available if required. While exporting, click Options to change export resolution. Before committing to your export, check the mesh with Preview before saving file. Further refinement can be made using Custom Resolution, but Fine Resolution typically yields an efficient, clean part export.