I can't take it - it drives me nuts. Whether I leave everything at default settings or tweak the hell out of Windows 10, I can hear my HDD spinning practically all the time. No, it is not failing, its been doing that for a year and yet to produce a single issue. I don't run OS on it - its a storage drive, nothing runs from it and tied to it. I watch a film on occasion or listen to music, but then close the file. I disabled a ton of services and driver services, and disabled ALL tasks and the system works fine, snappy, excellent - games freaking fly at high FPS, no stutters (although they all run from my SSD's...)! Yet this constant knowledge that my HDD is just doing something when idle freaks me out. All defragmentation/optimization-related tasks and services are off, Maintenance is off, Windows Defender is off, Cortana gone, Shell Experience Host not running. I don't remember this ever happening with any OS other than Windows 10. What could it be? I don't actually see the HDD LED indicator blinking when nothing is running from it (yet I hear it spinning), but I do see it blinking when I play a film from it (which is when I hear more louder spinning), so if we are to believe HDD LED indicator, the IDD is not running or being used when PC is idle, yet I hear it spin when it is idle. I checked all the SMART-related functions, ran every test possible - from quick scan to super low-level scan and all is perfect, but when PC is idle - I can hear HDD spin What's Windows 10 doing to my HDD???