It is highly recommended to use a FAT32-formatted USB drive plugged directly into the NVR rather than updating over a browser, as network interruptions can fail the process. Firmware Features

Ensure you are not installing "General" firmware on a "Region-Specific" (e.g., Chinese market) device, as this can cause a permanent language lock or boot loop.

: A free desktop utility that searches for devices on your network and allows batch firmware upgrading.