Congrats on the NAS purchase. Keep in mind that everything on your ethernet network path from the NAS to your Zidoo or Plex clients needs to be 1 Gigabit. If there's a single network switch or router or anything that's only 10/100, it won't be fast enough for high bit rate 4K. The way to do the scraping switch without losing your matching is to use "Syncronise data from other source". See this post: http://forum.zidoo.tv/index.php?threads/rebuilding-collection.97790/#post-215870