Gigabyte GA-M68MT-S2 motherboard archive, 873 KB in zip format, with no revision stated in the name. Gigabyte desktop boards come in several PCB revisions printed near the slots, and firmware can differ between them, so check that marking first. The contents are unspecified but likely a BIOS image or flash files. Back up the existing chip with a programmer before writing, and confirm the image size equals the flash capacity, since many Gigabyte boards use DualBIOS with two chips.
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 @laptopchiplevelrepair. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.