I would like to share my problem with you guys.
I have two HDD purple WD in my NVR 3TB and 6TB. One of them started giving me the problem of "NOT EXIT" in the NVR (3TB).
However, when I unplugged the HDD from inside the NVR and Then I plugged it in again it worked and the problem ended.But after a while, my other HDD 6TB had the same issue do I have to unplug it every time the issue occurs.
Is there any other permanent solution for such problem and why did it happen. Is it because of an electricity failure or what?