The NVR model is TP-Link VIGI NVR1008H 8 Channel Network Video Recorder. I install a 10TB hard drive inside the NVR.
 

I try to export one-day record in the NVR to an external hard drive.

The one-day record is splits into several smaller videos. I first try to export 1 small video, it works well. Afterthat, I try to export all videos at once, the NVR got crashed and restarted.

I realize that the NVR is not designed for exporting large number of videos, so I get back to export the videos one by one. However this time the NVR keep crashing constantly.

Please give me some advices to fix this. Thanks.