BIOS image for the ASUS K401UQK notebook, marked as-307 and labelled as tested and working. The as-307 token likely refers to a firmware version but is not explained further. The RAR contains a dump meant to be written to the SPI flash chip with a programmer when a board fails to boot or has corrupted firmware. Even with a tested label, read and keep the original contents first, since ASUS stores serial and DMI data in the chip, and check that the file size matches the 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 @biosarchive. 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 →