Okay, detail time. I had 3 4TB drives running in a RAID 5. Once the data was transferred to it from the 4TB drive in my PC, and I'd been using it for a week to make sure Kodi and everything was working properly with the NAS, I powered down the LS, installed the 4th HDD from my PC to bay 4 and powered the LS back up. That was 4 days ago and the power LED on my LS is still flashing white. All 4 HDD lights are solid green.