sounds like you’re perfectly set up to build an unraid server

synology 423+

does transcoding

synology automated backup of any/all computers on the network

synology drive works like dropbox

set and forget offsite backup with hyperbackup

can run docker containers and plex

I always understood as a balancing act in your vdev sizing. Too big = long rebuild times with so many disks spinning up every time. too small = wasted $ with TB loss to redundancy (raidz2 with 3 20tb disks only utilizes 33% of the TB purchased).

​

I’ve always felt you should calculate how many disks do you need to saturate your connection and go from there. 10gig trunk on your network then you’ll want 1 vdev to be able to saturate a 10gig line. any larger than that you don’t get any benefit from.