Setting content in Kodi

Hi, hopefully I’m in the right place. I have plugged my HD into my router which has a USB port. I can access these files through upnp in Kodi on OSMC but the ‘C’ button I use to set the content doesn’t give me the option to do it. I’ve followed the procedure to add a source and the only way I can see the HD is via upnp but it doesn’t give me the option to set the content so I can scrape the movies and tv shows. Any ideas would be muchly appreciated, thanks.