Small ZIP archive, only 120 KB, related to a board identified as P552LJ. The name says nothing more about its contents, brand or revision, and the size suggests a boardview or firmware image rather than a full schematic set. Unpack it and inspect the files before use. If it is a BIOS dump, read and save the original SPI chip with a programmer before writing, and confirm the image size equals the chip capacity. If it is a boardview, open it in OpenBoardView or a similar program and match the PCB marking first.
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 @cyberlanelectonik. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.