Revision 2.1 package for the MSI board MS-V388, stored as a 2.97 MB RAR archive. MSI uses the MS-Vxxx pattern mainly for graphics card boards, and different revisions can differ in components and layout. The contents are not stated in the name, so unpack it with 7-Zip or WinRAR and identify the schematic, boardview or BIOS inside. Match revision 2.1 against the PCB marking before relying on the material for power rail tracing or short diagnosis.
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.
7-ZipWinRARThe Unarchiver (macOS)