split search results sharepoint and file server

Hello,

I connected the file server to our sharepoint so the SharePoint Server 2013 also searches in our file server. But that's not sufficient, they want to be able to split the search results between SharePoint and the file server. So is there a way to split the search results? I thought I could use a search refiner but I didn't manage to do it so far.

Maybe in two columns like the left column is for SharePoint results and the right column is for the file server results?

Kind regards,

Dries