Yes it should be working. Do feel free to post more info and settings and we might be able to help diagnose the problem or bug
A really good question.
Generally speaking the major disk loading occurs during game boot.
Because Stationeers doesn’t use a lot of textures, there also is not a need to load and unload textures.
The exception to this is file loading and saving for worlds, and given world saves can be quite large they could cause issues during auto saving in slower disks.
Having said that the game itself loads all its resources into RAM and doesn’t do further loading during game execution