why any download can be opened in Solidworks?
I have Solidworks 2016, and every model I download in here (.sldprt) doesn't open. There's a message thats says, "Can not open .... future version" please help.
It means the model was created in the 2017 or 2018 release. The 2016 version will not open these "future versions".
Your best option is to download a generic version of the file (step, parasolid, iges, sat...etc.), or ask someone here to convert it to one of those formats.