I have searched this question a lot but all were saying, need to upgrade to ssd. But I have m.2 ssd and I have that problem, I also have two hdd connected to sata, primary os is in ssd. 100 disk usage for 0.1 mb/s is showing in ssd not hdd. Although I removed hdd and restarted it but it was dead slow. Still after removing it didn't get fixed but when I install os fresh in ssd then everything is fine for hours but this problem occurs after some hours of usage, I installed os 3 times, everything is good at start. Ssd is working fine! But dont know what the problem is.
Please someone help.