Reolink NVRs and Cameras.
Restore on NVR
Step 1. Launch your NVR monitor, go to "Menu".
Step 2. Go to “System”, then enter “Maintenance” to click “ Restore”
Restore on Client
Log in the camera/NVR via the Reolink Client and restore in the Device Settings->Maintanenece tab.
Restore on App
Step 1. Launch your Reolink App, go to "Device settings".
Step 2. Find the Restore button and click it.