An update on my post #56, point (5) about the Momentum Cache.
The article I had seen is
Crucial’s FREE Momentum Cache Works on Any NVMe SSD! – Our First Look at RAM Caching on NVMe SSDs - The SSD Review
If you enlarge the 1st picture in it to make it readable, the Momentum Cache driver is v1.7.3.0.
Based on the rest of that article, the program's version they used was
3.46.062017.04. Its link points to Crucial but that's already unavailable.
It seems that Momentum Cache was free for all brands of SSDs until that version.
As luck would have it, my USB 4TB problematic disk, had a copy in it, dated 2017-8-1. No idea when I picked it up since I move stuff around and dates change.
The presumably working version I have, doesn't. It doesn't recognize any drives in my system.
I found another copy (same version) in a Frensch site, Exactly the same as mine.
They showed there the supported list and my Crucial model (the SSD I use for data) wasn't in the list. Which explains why it doesn't recognize any drives for me. There must be at least one acceptable Crucial drive before it works.
All later versions I came across, are using as cache driver v1.7.3.2 which works only for Crucial SSDs.
As is, I can only use later versions for my single Crucial.