I have a QTH163 in 2016. It it playing video in real time fine, but when I try to install an external hard drive, it does not seem to be working when I try to format the drive. I was able to format it to a exFAT on my PC, but I installed it in my DVR and it does not record. I also tried to click format again on the DVR and it does not format. What should I do? The HDD is good, its a WD Purple that I bought a week ago, its empty.