I am running Windows 10.
I have a WD blue HDD which I use to store video clips and nothing else. When it hasn't been accessed in a while, it goes to sleep. When it's asleep and I go to access the drive in the file explorer there is a short pause and an audible whirring sound as it starts up. This is normal.
I have noticed this same sound at many moments when I wouldn't expect it. For example, I just loaded YouTube in Google Chrome and some icons on the webpage didn't load until the HDD had started up. This makes it seem like the browser is caching webpage UI elements on this HDD for some reason. My OS and all of my programs are installed on a different drive.
Does Windows 10 have some behavior that wakes up drives even if they are not needed for what it's doing? Could this be a weird behavior of Chrome?