I am using SP 2013 onpremise. When I go to the mysite onedrive I see a library. In top right corner I see a sync button where I can sync the library to my offline desktop. When I go to some normal document library in some intranet site collection I do not see this sync button. Is there some way to save the documents of my library offline to my desktop?
See this printscreen for the onedrive library.