This won't sound pretty, but here we go.
I use bunch of WD Red 3TB HDDs. First HDD is pluged-in to Banana Pi (luks encrpyted), Second on my wokring PC Bitlocked, somehow backing up data of the one on Banan Pi.
And couple more - Third and Fourth - 3TB HDDs on pc in living room with movies on it - not backed up.
Rock64 got my attention based on obvious reasons but also as 4K player, then I have decided to get rid of on "monster" in my house - a desktop pc in living room. Also I'm reconsidering ASUS Tinker Board for 4K playback.... I keep researching...
What concerns me more is where couple 3TB drives will go from living room...
It looks like I am going to have one device with 3 HDDs in it.
A second device will run rsync server to backup important data from First to Second HDD. (btw fifth hdd backup offsite not mentioned...).
I would like to tidy things up somehow. Not to make it even more complicated... And FINALLY make it whole automatic.
I like that I'm running Banana Pi 24/7 and not be bothered about energy consumption. My guess is my NAS build would have similar characteristics. Any recommendations for low cost, low energy, mixed HDD NAS for three HDDs?
I just mention here Helios4 kick-starter which got into my attention but I don't know how far it is... Or something "bigger" (not ARM)?