The main SSD (C drive) has over 500 GB available. The game runs from the D drive, which has only 200 GB left out of nearly 2 TB.
The game is stable. I downgraded the graphics and generated a new world (c. 5000 x 5000).
I reseated the memory, re-cleaned the computer, chose new DIMM slots. This is an old PC that needs replacing.
I've also stopped running Chrome while playing the game -- it's fun to watch streamers play 7D2D while playing it myself, but that's a small price to pay.
And I do not use EAC ((stopped using it a while ago)