Or rather, do I need a new NAS? I've got one currently and I use it to store my iTunes library. My MacBook accesses it in order to sync media to my iPhone / iPad. My Mini runs 24/7 and accesses it in order to stream my entire iTunes library to my AppleTV via Homesharing. I've got no DLNA servers, no iTunes servers, no Plex Servers -- just one shared drive that's shared to both the Mini and the MacBook. The Mini and the MacBook each have their own iTunes library files locally -- they only share the actual media folders. Everything works but I'm worried about a failure due to the age of the NAS and its drives. The NAS is also over 80% full. I was shopping for a replacement when I started to wonder whether a simple RAID drive connected to the Mini via USB wouldn't accomplish everything I'm currently doing with the NAS. The Mini would see the RAID as an external drive that would get mounted after every reboot so I don't think I'd have any problem there. If I then share that same drive on the Mini and mount it on my MacBook will it perform as well as the existing NAS? If it matters the MacBook is a 2014, the Mini is a 2012 with 16GB RAM, and the existing NAS is a Zyxel NSA320 with a Marvell 88F6281 Kirkwood SoC @ 1.2 GHz and 512MB RAM.