Applies to: Reolink cameras connected to the NVR and Reolink NVR.
Cause 1: The new firmware file is wrong.
The firmware files are categorized by different hardware versions in the firmware center:
Please go to Firmware Center and find the correct firmware.
If you’re not sure about it, please share the system info page with the support team and we will help you identify. Please refer to: How to Find Model Number of my Camera or NVR
Cause 2: Operation error.
If you want to upgrade the NVR, please click Upgrade from USB. To upgrade the cameras, please click Upgrade IPC from USB.
Cause 3: Corrupted/Not supported file.
All firmware is .pak format. The file you downloaded from Firmware Center is the .zip file, please unzip it and then you will get the .pak file.
Cause 4: Other issues.
Please disconnect the NVR from the network (unplug the network cable), and restore it to default then try to upgrade again.
If the problem still exists after going through the steps above, please contact support team for further help.