An archive of repair files for MSI hardware (board MS-15000). Shared as “MS-15000 Univa _V211_2017-7-12.rar” — a .rar file, 17.9 MB.
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 @led_software. 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.
7-ZipWinRARThe Unarchiver (macOS)