Archive for the Dahua DH-XVR1B08H recorder, an 81.7 MB ZIP; the name gives only the model, with no board code or version. It probably contains a flash dump or firmware for recovering a unit with corrupted software or boot problems. Open it to see what is included, then compare any board identifiers inside with the PCB. Always read and back up the original flash before programming, and make sure the image size matches the chip.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @laptopchiplevelrepair. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Built-in OS tools7-Zip