5.7z.016 Site

You cannot open 5.7z.016 by itself. It is useless without the preceding files ( .001 through .015 ).

It is part of the SexFall 7.5.3 modpack for Fallout 4 . 5.7z.016

If you are trying to install this specific modpack, I can help you: Locate the download links for the other parts. Understand the installation order for the SexFall mod. Do you have all 16 parts downloaded already? You cannot open 5