Firmware image simply called full, 12 MB, with no extension and no brand, model or board number. The name suggests a complete flash image rather than a single region, and 12 MB is often the combined size of two chips, for example 8 MB plus 4 MB, on boards that split firmware across SPI parts. That cannot be confirmed from the name. Inspect it in UEFITool before use, compare it with reads of the chips on your board, and save backups of every 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 @Laptopdesktopbios. Enginerys does not host this file.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →