Tutorial: how to minimize file in SolidWorks without having to convert.
Tutorial: how to minimize file in SolidWorks without having to convert
Answered with a tutorial: https://grabcad.com/tutorials/tutorial-how-to-minimize-file-in-solidworks-without-having-to-convert
I can guess the file size cut came from either the thumbnail you see in your OS browser, and the pre-renders Solidworks made to fasten up loading.
One time i saved a complex model after a PhotoView session (and using the solidworks viewing appearance "photoview"). It was huge :/