Are you powering the drive externally? ie using a USB hub?
Seems off the point, but what protocol are you using from the cameras?
The drive has a power adapter, it's not USB powered. The cameras are using Onivf for a protocol. I am using 4 Dahua IPC-HFW2100 and 3 Dlink DCS-2132L (WiFi).
This is the drive i'm using: http://amzn.com/B00834SJS0
Also, i tried using the Network Video Monitor Software that came with the Mini NVR and tried to make changes this way, but the settings don't apply after i hit "Save Parameters". When i go back into it, they are back to the default settings. Is there a reset option? Maybe i can set it all up again. I have rebooted it several times. Not sure what else to do.