BIOS package for the ASUS X441MA laptop, where 309 most likely denotes BIOS version 309, an earlier release than 314. The file is a ZIP of around 5.56 MB, so check its contents after extraction to confirm the full image is there. A dump like this serves to reflash the SPI chip when the machine fails to post after a bad update or flash corruption. Read and keep the original chip image before writing, confirm the board revision, and make sure the image size matches the flash capacity.
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 @biosarchive. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →