Hi,
This sounds quite strange what you mention. How big is the project library? The other two GRAPHISOFT related libraries should be not bigger than 2 GB together, but I would be even surprised if your project library needs 100 GB.
My educated guess is that the project you loaded is really big, and ARCHICAD needed to cache not only the model data, but even data usually it stores in the RAM.
Also, if you leave the project and join to another - can you replicate the same thing?
Kind regards,
Noémi Balogh
Community Expert, Admin