You may need to reinstall kodi afresh - my suggestion is this - delete kodi by going to apps select kodi - clear cache - then clear data then force stop and then uninstall. Just to wipe all traces of it. Reinstall kodi afresh however as you are setting up the location of your media again, choose to parse local nfo files and not selecting TVDB or alike - this means kodi will get all the info about your media from the nfo file which points to where all the art is (which is usually in the same folder as the media). That way kodi does not need to use TVDB to download art for all the media you have since the folders of your media already have the necessary fan art etc.
Then your box will have much more space as kodi will take lesser space and once any new media is added kodi just reads/refreshes from the local nfo files and not from a database online. Hope that helps.
I moved the Kodi database to the server using path substitution.
