I ordered a combo M.2 and HD dock last week, the Sabrent DS-UFNC.

Here’s the manual for it.

I wanted it for one of my Test Bench PC’s at my Store, but also to first try out as an external Fusion Drive.

Here is an old MacWorld article on setting up a Fusion Drive.

I had to fire up an older Mac mini running Mojave, as the process doesn’t work in macOS Big Sur onwards, and even Catalina seemed to be problematic.

Makes quite a difference to the Read/Write speeds over it as just a Hard Drive!

I used Blackmagic Disk Speed Test, and graphed the results (MB per second, btw):

Currently listening: LDP Breaks - Rober Vaz - “Set Liquid DnB 002”