Firmware file for the Acer Aspire 4739Z in .fd format, 2.06 MB. The .fd extension usually marks a BIOS capsule or update image rather than a raw chip dump, so its size does not exactly equal a flash chip and it may need trimming or a vendor flash utility instead of direct programming. Technicians open such files in UEFI tools to extract the region they need. Check the board number of your unit, and back up the original SPI chip before any write.
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 @ComputerBIOSBinFile. Enginerys does not host this file.
How to open a .fd file
UEFI flash-device image, typical for Insyde H2O firmware on Acer, HP and Lenovo laptops.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →