This request has been reported and logging an enhancement request on behalf of valuable customer.
We have users with SSD for C drive and these are smaller in capacity.
It is an issue as we are not able to clear any more space, and as the REVIT projects become more complex, more temp area are required when users work on multiple REVIT files.
We need to allow all temp space requirement by REVIT to be configurable, so that we can change the location when more space are required.