Was thinking about an additional drive but would I really need one? This is purely for a sim racing rig. It will only be used for racing games and attached to a racing rig.
I think 2TB should be enough and I can always add another M2 drive if needed.
Moar disk?
Possibly because of old habits (and multiple OS partitions) I have one fast drive for the OS, and on big drive for storage.
Additional usb / thunderbolt etc. ports on a separate card?
I don;t see much point in self-build these days - as CYOA says, warranty. Plus effort.