Are you sure some part of windows is not on the HDD? Windows has always been good about not waking my HDD drives unless it was necessary.
My best guess would be you have something linked to HDD on desktop. As Windows Explorer scans desktop to do your move request, that wakes up HDD.
Want to thank everyone for the thoughts and comments here.
If I'm not using my computer it is shut down completely.
It was just that the hard drives are not being used most of the day.
The main work is moved to the SSDs and kept there till finished
I've not done anything unusual with the hard drives, just storage drives.
Now your "linked" comment may be correct.
I keep a folder for each drive open on the desktop all the time
in case I need one of the files while editing .
Probably having the open folders causes the horrible lag on the desk
top. Can't stand that so the drives are no longer allowed to sleep.
Hmm, maybe I can go to external USB storage. I know they turn off.
But do they wake up because I opened an optical drive etc. Must test this.