Like others from the 80's and 90's, I accumulated more than a few video and audio items....that in 2016, I would like to retain the content of, but not necessarily the physical item. Two years ago I set up 5-disk Synology NAS, and have been thrilled with the performance. I use it for my iTunes library, and streaming media server via the Plex application.
I have begun to fill it up. I wanted a secondary NAS storage option, but didn't want to spend the money for a second Synology unit. I went with the diskless Seagate 4 Bay NAS, and am trying to use some leftover SATA drives instead of purchasing new NAS drives. I hope this works out but I will set up a backup just in case.