: Use a USB flash drive (ideally 4GB to 32GB) and format it strictly to FAT32 .
Copy the file to a FAT32-formatted USB drive and plug it into the DVR/NVR. Menu > System > Upgrade , select the file, and click Important: After it restarts, performing a Factory Default cp plus firmware update
: DO NOT turn off the power during the upgrade process; doing so can "brick" your device, making it unusable. : Use a USB flash drive (ideally 4GB