Hi Kriste,
I have not used the hard drive for memory since WF5, because back in those days, the RAM allocation was about 8GB. So I would allocate swap space on the hard drive to run larger models, and it would work, but ran much slower. I submitted a product idea years ago to address this problem, to increase the RAM allocation for Creo Simulate. The product idea is linked below, and you can see some comments from Mark Fisher on product development. Welcome to the forum.