Rock can only see one drive, is there a trick like a sym link?

So on a intel NUC 13 i7 pro if i run rock on the B key drive and populate the sata and the NVMe Rock only sees one of the drives for its Internal.

So maybe it can only mount one drive for its music internal ?

I want to be clear that Rock is on its own physical drive and there are 2 other physical drives but rock only sees one for its internal storage.

So if it is limited to mounting one drive, any tricks.

And a seperate question, can roon see a 16TB drive internally as long as BIOS can handle it.

** Edit. More info, which I am sure many people know, im a newbie.. I can see the 2 drives in Storage but one gets labeled InternalStorage-2 and any music put on it is not seen by roon. So it does mount the drive. It just wont index it.