BIOS or firmware package stored as a RAR archive of about 17.1 MB, with a name that gives nothing beyond the number 20, so the target device, board and chip are unknown. Open the archive first and read any text notes or file names inside to identify the platform it belongs to. Before writing anything with an SPI programmer, read and save the original chip contents, confirm the board number printed on the PCB matches, and check that the image size equals the flash chip capacity, since a mismatched dump will not fit..
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 @skclappybios. 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 →