adding RAM diminishes my hard disk space

I have Two Dell Precision 7810 towers, I just upgraded the first one to 256 Gb ram (dual procesor) and all went as expected running windows 10 pro 64 bit.

Now I did the same with the second but I had to stop at 192 Gb because It ran out of hard disk space ? This one was still running on windows 7 utlimate so I thought the OS was the culprit ...

Now I have her running on windows 10 pro 64 bit but the problem remained ... is it a defect, a setting, I cannot find what to do...

with 192 Gb ram I'm alsmost out of hard disk space (500 Gb), anyone has a clue?

Adding RAM will affect the size of the system's hibernate file hyberfil.sys, so 256GB RAM will eat 256GB drive space.

Additionally, the virtual memory will naturally default higher, which probably isn't necessary with so much RAM.

Disabling Hibernate &/or changing the virtual memory size should alleviate the disk usage issue.