TrueNAS or unRAID

I build a TrueNAS Scale server a couple of weeks ago, mainly to be used for Plex.

I have set it up mostly working to rip my Blu-ray disks and automatically download new “Linux ISOs”, but with no experience with Linux, I have been struggling setting up permissions and other things via command line. Most videos on YT are from previous versions of Scale, which they are hard to follow.

I currently maxed out my 8TB array, (2 HP OEM 7.2k and 1 WD Blue 5.4k) one is in parity, but I just found out that it’s not as simple to add drives to a pool in ZFS.

I have 2 WD Red from an old MyCloud system I had laying around, which are the ones I want to add to the array. All of the drives I have are 4TB

I honestly do not mind starting all over if unRAID is the way to go, but not sure if that’s the smart way to go about it. I also have a 256 nvme that I would like to use as a cache drive if that means by file system would benefit from it. I just want to set it up and have it running.

Should I stick with TrueNAS or move over to unRAID? Would I see any benefits?

My set up is an i5 7600, 32GB of RAM

Any help would be appreciated