

2·
5 days ago-
Intermittent crashing and instability sounds like faulty RAM modules. Use memtest86 from a USB drive (NOT the version that is accessible from the grub boot menu) and see if you get errors. A general test using the defaults is fine. You’ll know them when you see them.
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as for I/O issues, that could be your storage being faulty or starting to fail. I’d swap out the 1TB ssd you mentioned for a different one, if you have any onsite. Also could just simply re-seat the existing SSD modules in case its not fully making contact (I personally doubt that’s the case, but I have to suggest it anyways.)
Seconded…