Flash backup for the Dahua DH-XVR1A08 8-channel recorder with PCB code D1811, packed as a 15.6 MB ZIP. The name marks it as a 16MB backup, so the image targets a 16 MB flash chip. Use it to reprogram the memory of a recorder stuck at boot or with a damaged firmware. Confirm the D1811 code on the board, dump your own chip first in case restoration is needed, and verify the chip capacity matches the 16 MB image.
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