A firmware image for a Dell model numbered 3421, likely the Inspiron 14 3421, though the name gives only the number. The 8 MB size matches a 64 Mbit SPI chip, and there is no version or board number. Repair technicians write such dumps with a CH341A or similar programmer when the machine shows no display or keeps restarting after a BIOS failure. Back up the original chip first. Make sure the motherboard and the flash capacity match before you write the image.
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 →