Turns out the issue is HP limits the BIOS Optane options so only option in the original laptop is to convert it to Non-Optane which will erase all the data…there should be an option to Disable the Optane cache and that preserves all the drive data but sadly that option is not available.I have a 256GB NVMe M.2 drive [salvaged from a Notebook] in a Sabrent USB-C case. The model is Intel HBRPEKNX0101AH and label shows 16GB for the Optane. I wiped it using GPARTED on my Linux Mint desktop and ended up with a 238GB partition, no mention of Optane or other partition on it, works fine as a portable drive.
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I also notice that the BIOS is saying incomplete volume member disk, so that may be a clue too.

My Computer
System One
-
- OS
- Windows 10
- Computer type
- Laptop
- Manufacturer/Model
- HP Envy x360