First volume, 1.93 GB, of a multi-part RAR archive named as Adobe Lightroom Classic version 14.5, multilingual. It carries photo-management software and has no relevance to schematics, boardviews or BIOS dumps. To extract it, place part2 in the same folder and open this first volume in WinRAR or 7-Zip, which then reads the following parts automatically. A missing or damaged volume stops extraction. Because the package is not from an official source, check it with an antivirus before running the installer.
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 @laptopschematics. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.