BIOS or firmware RAR of 12.4 MB named GD25_512, a label that points to a GigaDevice GD25-series SPI flash and a 512 figure, likely capacity in megabits, though no device or board is named. Without a model the file is hard to place, so inspect its contents and any notes. Dumps of this type are written to SPI flash with a programmer. Check the part number and size of the chip on your board, ensure the image matches it exactly, and back up the original contents 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 @sboisworld. 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.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →