SOLIDWORKS supports importing STEP file standards 203, 214, and 242, which include geometry, appearance, and product manufacturing information. Opening a STEP file is simple via File > Open, with options to adjust import settings under System Options. Key features include 3D Interconnect, which keeps files in STEP format to avoid translation errors, and settings to import as solids or surfaces. After import, users can run diagnostics to fix errors and optionally use feature recognition, though direct editing is often recommended. These tools streamline interoperability and ensure accurate integration of STEP files into SOLIDWORKS workflows.