An archive of repair files for Gigabyte hardware. Shared as “GA-AB350M-DS3H V2 R1.11 (PK).rar” — a .rar file, 502 KB.
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 @pkbiosbdv. 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)