Synology's DiskStation DS923+ is the best 4-bay NAS in the market today. I used it for six months as my Plex server, and if you're interested in a new NAS, here's why you should upgrade.
Synology DiskStation DS923+ long-term review: The best 4-bay Plex NAS server gets even better : Read more
Synology DiskStation DS923+ long-term review: The best 4-bay Plex NAS server gets even better : Read more