If choosing Synology look into the Plus series (f.e. DS723+) or you end up with ARM CPUs and lose many of Synologys software goodies.
Their Active Backup for Business software is a nice way to backup the household machines as an example.
As you enter packages in this list you will see which models are supported: https://www.synology.com/en-us/dsm/packages
I have two NAS Solutions, both using raspberry pis running OMV. First one is a single external USB hard drive acting as a buffer when it downloads my legitimately obtained media before transferring its data to the second NAS running two USB hard drives running RAID 1 for deep storage and streaming.
The single drive can power itself through USB. The other server with 2 drives have their own independent power supply. Look up WD EasyStore to get an idea of what kind of model they are.
I always rolled my own Debian servers on microitx boards. I found a cheap synology a few years ago though and gave it a shot.. I'm a convert for sure. They fully live up to the hype and are absolutely worth the price.
3rd world idiot here. Docker pants like in clothes, was in a mall when I read your comment earlier and I spent a fair bit of time thinking up a response to your comment, but the joke's on me.
Just installed requestrr in a minute from the gui in unraid. For some of us, this is awesome. I used to run a Fedora 14 samba server for many years, slowly working my way up to 17 or 18 until my initial partition (bad) choices made me look for something else. Can't remember how long it is now, but my same Unraid server has been running for ever. Drives growing, motherboard changing, ram & cpu upgrading along the way. Yes, it costs 70 dollars or something up front, but in time and energy saved for me, it has been an amazing ride.
Plenty of FOSS ways to set up a NAS. I'm going for Debian with ZFS myself, I prefer custom solutions as they are almost always more flexible than "NAS OS:es".