I Need to Think About Replacing My NAS, but...

I've an old NAS. It's a Buffalo TeraStation1400D with 12 TB of drive space.

I'd been using it to store snapshot backups of my Macs.  I've gotten some new Mac systems and wanted to leverage the NAS a bit more and found that the NAS needs some legacy things that Apple is getting rid of very soon, so Time Machine will no longer work with my NAS.

I bought the TS1400D back in 2017 - hard to believe that was nine years ago!  It wasn't exactly cheap, either (a bit over $600).  At some point, I need to think about replacing my NAS, but this is a bad time to buy such things, as the prices of drives and memory or anything that requires lots of it.  Seriously.  

For now, the NAS will still work but I won't be able to use it with Time Machine.  I can get basic with this - buy an external drive enclosure to use with several largish HDDs that I have.  That'll get me by for a short while.  I just want to be able to back up at least one of my new Macs - both have 1 TB drives.  

I've functional spare 2 TB and 1 TB HDD drives.  I bought a 2 bay enclosure.  The plan is to put both in the enclosure.  Eventually, I'll find another 2 TB drive and swap out the 1TB drive - that way I may be able to configure them using RAID (the enclosure supports RAID).

I've a 2-bay drive dock but it's only supposed to be used for duplicating drives and acessing them for non-permanent tasks.  I frequently lose connectivity with that dock when using them with my Mini - I'm thinking maybe it's saturating the USB 3.0 connection when I use it.  Hopefully, I won't run into the same issue with the new enclosure.

We'll see how well the new drive works.