Please follow up the below steps to reset the NVR:
(1). Please format your USB-disk to FAT32
(2). You can directly download the file from the attachment and save it to your USB-disk.
Please note: Please directly save the file in the root directory of your USB-disk,
do not save it under any other folders.
(3). Please insert the USB-disk to the NVR's USB ports.
(4). Please connect the power supply to the NVR. Once the NVR system starts,
you will hear "beep" sound.
The system will reboot itself several minutes later, please be patient.
Please note: This file can be used only once. You need to re-save it to your USB-disk on the future using.