Re: I'll never buy another
That is to say I have forsworn getting another Crucial NVMe thingy.
Not because the one I got was crap (although eventually that was proven to be the case) but because I was too late (thinking the problem may be with my machinery - which is quite picky when it comes to NVMe - and then trying different formulations) to get help from Amazon, and when (per Amazon suggestion) I emailed Crucial to recover the ridiculous amount I paid they did not even reply.*
Once bitten .....
FWIW one of the things I tried was a PCIe adapter which takes NVMe SSD's. The Crucial one did not register. Threw it in the bin. Bought another - non-Crucial - and it is fine.
*P.S. I do not live in the USA so getting redress is sometimes too much of a PITA.