UNITY 2018.3.9f failed writing bake system resource file

I have pretty low baked lightmap resolution set on my terrain, but i still get this error with lowest settings possible. It says: baking resources job failed with error code 5: failed writing bake system resource file. I dont know what is this related to, but i have 180 gb free memory on my hdd and gi cache memory limit is set to 150 gb. I still have these issues even after disabling antivirus. Cleaned GI cache many times. What the hell. I have no idea how to fix that and without having my terrain baked i have like 20 fps. With terrain disabled, i have 80 fps. I even tried to look up on these forums but every issue with this is related to reading, not writing. Why unity cant write??? Please help, im desperate