A 147 MB RAR archive named only Macrium, which points to Macrium Reflect, a Windows disk imaging and cloning tool, though the name gives no version or edition. It is not a firmware dump; in a repair shop such software is used to image a customer drive before work, clone an old disk to a new SSD, or restore a system after a board swap. Check the contents and scan the archive before running it, and verify that any backup image can actually be restored before wiping the original drive.
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 @lappysan. 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 →