A firmware image for a Dell model given only as 5559, most likely the Inspiron 15 5559, with no extension, version or board number in the name. The 16 MB size corresponds to a 128 Mbit SPI flash. Technicians write such a dump with a programmer to restore a board after a failed update or to fix no-POST faults caused by corrupted data. Read the factory chip and keep a backup first. Check that the chip capacity on the board matches before programming.
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 @biosfilebins. 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 →