My setup is based on Roku devices connected to a Freenas server with 12x 3Tb HDD on a RaidZ2 setup to store all the media which is then served through Plex Media Server. It works very well and I've had no problems with this setup aside from a hard drive dying on me every once in a while.

Plex also has an option to use Google Drive or Dropbox and others as a storage medium through their new (although only for the premium Plex Pass holders) Plex Cloud (it's also possible to roll your own though, i've written about it here: https://nunosouto.com/blog/how-to-install-plex-cloud)