Not the right solution, but a possible workaround.
Since you have all of that memory (128GB)
and Scene never takes more than 10/11 GB:
create RAMdisk (ImDisk) with all of the scan files
register it from that disk and then copy the
files from the RAMdisk back to your real HDD/SSD/network.
Give the RAMdisk 100GB or so (with IMdisk you can
tell it to take all except "n" bytes (n in kilo,mega,giga,etc)
(point your Scene temp space there also - worse that can
happen is you run out and you know then you will need to
split them, or get more RAM
I think exFAT has the lowest overhead and you don't care about
reliability of the file structure in case of a crash, right?
At least try it and let us know how it goes.
For the FARO developer folks:
Scene needs to have a "don't conserve memory" option for people with lots of RAM
or a use up to nGB, when "n" can be up to at least 1TB, even though I don't
think any of us have machines that big.
Memory is a lot cheaper than people, rarely gets tired, doesn't take vacation
and never wants a raise.
What version of Windows are you running?