This is my personal server and NAS.
Built in the old case for my main build (https://pcpartpicker.com/b/kjm8TW) and all the main components are second-hand, other than the NIC.
It runs RockStor and
currently has two 1TB drives in a RAID 1, but soon that will be upgraded to 6+ TB in a RAID 5 or 6.
Now it is running 4 1TB drives in a RAID5 array, for a maximum if about 3.74TB of available space (not calculating the RAID overhead)
Houses my music, photos and movie collection.
Also, PCPP apparently doesn't have the FX-6300 listed, which is what is in this build. YES, it's overkill, but it is what I found on Craig's List in my price range.. that was more than dual-core.