To get the correct backup or update file, follow these steps to identify your device and locate a compatible download:
: Log in to your DVR and navigate to [System Info] > [Version] to see the current firmware revision and model name. Download Firmware DVR 80235 Rev 4CH Backup rar
: Common manufacturers for these generic units include Hikvision , Lorex , or CP Plus . 2. Prepare the Firmware for Installation To get the correct backup or update file,
: Click USB Upgrade , browse for your file, and click Start or OK . browse for your file
: Once you find the matching .rar or .zip file, extract it to find the firmware file (often with a .dav , .bin , or .pak extension).