Firmware for the Dell Precision T3620 workstation, according to the name, which says little else: no board revision, version or chip details are given. It comes as a 12.8 MB RAR, so open it to see whether it holds a full SPI image or a vendor update file. For recovery with a hardware programmer, the image must match the flash chip capacity exactly. Read and archive the existing chip contents first, since they may hold the service tag and ME configuration.
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 →