How did I miss this thread before?
My rig is a Fractal Array R2 Mini ITX case. It is running an Asus board with an i5-2400 series CPU and 4 GB of RAM.
I don't remember the specs on the boot drive, but the data is stored on five WD Red 1.0 GB drives in RAID6 configuration. RAID6 means there is a lot of redundancy, so I'm only getting a little under 3 TB of storage from the 5 TB of storage in the array, but I can drop two drives without any data loss. Data protection was and is my key goal.
The operating system is Windows Home Server 2011. When I built the machine, I was using all Windows 7 client PCs, and WHS was a dream. WHS has client software that worked until Windows 8.1 that would run incremental backups on any client PCs. You could do restores from this data store any time you wanted, and it was very slick. This functionality has been greatly reduced however, with Windows 10.
However, the server still stores all my MP3s, pictures, a bunch of video files, some that we took on our phones or camera, and a few DVD rips, and all of my documents and files for me, my wife and my parents (I have my parents files there for backup more than instant access, I set their laptop up to VPN in for occasional backup).
I use CrashPlan to back up all of this.
As I watched WD Red drives balloon in size, I griped with my coworker that my RAID array was getting undersized, but would need to update all 5 drives to increase the size of my array. However, that is just the nerd in me being unable to be happy with what I've got, because despite this rig starting to show it's age, I have never had a risk of running out of room. Despite what I think is a ton of data, I'm never dipped below 1 TB of free space in the array.