A 1.75 GB RAR bundle described simply as MSI ALL, implying a broad collection of MSI repair resources rather than one model. No board numbers, firmware versions or document types are given, so expect to sort through the contents after unpacking. Collections like this commonly gather schematics in PDF, boardview files for viewers such as OpenBoardView, and BIOS images. Before use, compare each file with the MSI board number and revision silkscreened on the PCB, and back up any flash chip before writing.
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 .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.