This post talks about what is an STP file and how you can open such files in Windows 11/10. STP or STEP is a 3D assembly file saved in Standard for the Exchange of Product Data (STEP) format.
FBX is an advanced 3D file format that can hold more 3D data than the OBJ format, including textures, models, joints, animations, camera, lights, skinning, etc. While OBJ is a rather simple 3D file ...