This was my first ever build. It runs Freenas OS and is used solely for Plex.
It has 4x 4TB drives for media and is set up in RaidZ2 which gives me just under 7TB of usable space. The other two SSDs are used for the Freenas OS and Jails.
I am looking at adding another two 4TB drives soon and rebuilding my RaidZ2 vDev with the additional two drives giving me about 14TB usable storage space.
I am using the stock case fans at the minute which has managed to keep the case at a reasonable temp (and quiet enough), along with the stock intel fan which comes with the cpu.
Tell me what you think and if you have any suggestions on additional supply and extract fans please do say below.