Note by @fastfinge

@quanin @mcourcel The problem is...I...don't know? I don't always leave the laptop on all the time, obviously. And sometimes, of course, Windows just crashes for one reason or another. Or it installs an update overnight or whatever. And then the first few times I noticed it I went "Huh." and rebooted before I noticed the pattern. And of course it's my secondary drive, so I only notice it's gone when I go to play a game (it's where Steam installs all the games); if I'm just browsing the web or whatever it could be gone without me even noticing. October is when I noticed the pattern, started leaving the laptop on 24/7, and checking the drive frequently.