Someone please save HDDs! They're awesome!
Coincidentally, only few hours ago my SSD was saved by HDD! I booted up my PC and went away for a few minutes. Returned only to be welcomed by busy HDD noises. I quickly turned by WTF into resource monitor - and (not)surprise! - PID 4 was munching D:\System Volume Information. That's really annoying, but what really terrified me - the same was happening to SSD C:! I have explicitly turned off defrag, updates and other stuff for it, but still. And I would never spot it because SSDS DON'T MAKE NOISE!!