Digital Watchdog SD Card Backup

I am about to install some Digital Watchdog DWC-MV421D cameras with their Spectrum Blade NVR. The cameras are advertised has Having "Local SDHC Card Remote Back-Up". I have bench tested the system and inserted Class 10 8GB cards into each of the cameras and formatted and configured them for motion recording via the camera's web browser. I spoke with Digital Watchdog's technical support people and was told that in the event of a network outage that the video images would be backed up onto the cards but the data that is captured is NOT sent to the NVR once the network connection is re-established. I was told that you would have to physically remove the SD card from the cameras and put it into a computer for viewing. I thought that the intention SD (Edge) recording was to buffer the data and then send it to the NVR once the network connection comes back up?

Does anyone have any experience with Digital Watchdog's products who could help me out here? Thanks

(I am not in any way trying to discredit the DWD technical support staff. They were all quite pleasant eager to assist.)

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