After my Windows 10 starts up, my non-system HDD (WDC WD5000AZRX-00L4HB0) takes a few minutes to load. Until that, my shortcuts there are white, and if I try to open the drive in win explorer, it freezed (win explorer) until the drive "wakes up".
I don't know how relevant this is but: I have installed Win 10 about half a year, it was not activated for approximately 2 months. After activating + 1 month this problem started to appear.