10 million isn't that much, 10 million floats is around 80MB, you can store that 10 times in just 1GB.

It seems you might not be familiar with finite element models. It's more than 10 million floats. I'm sure it's double precision, and each node has 6 degrees of freedom. Plus, each node can be tied to multiple elements, so there's element data there along with different types of stress and strain data. It's not uncommon for the output files to be 150+ GB, depending on what information is output.