Here are two ways to upgrade your NVR.
1. Keep your NVR connected to Internet and make sure status is ONLINE.
2. In NVR's main menu - System Setting - System Admin - System Upgrade, choose Online Upgrade.
If your NVR is not online, you will need to download correct firmware and upgrade your NVR with an USB thumb drive. After it's upgraded, you will obtain online upgrade fearure eversince.
1.Find your NVR model # on the bottom label, download correct firmware for your NVR. Find your NVR model # on the bottom label.
2.Use an USB flash disk, copy the firmware to the root directory of the USB drive.
3. Plug USB disk to the NVR's USB port. Go to NVR's main menu - System Setting - System Admin - System Upgrade, choose Local Upgrade. (As shown in picture below)