Archive named th510-d4 with version 2.4, around 8 MB in RAR format; the name gives no brand or full board number. The th510-d4 tag probably identifies a motherboard model, possibly one using DDR4 memory, but that should be confirmed from the board silkscreen. Contents are not described, though the size fits a BIOS image for an 8MB SPI flash chip. Before programming, compare the model and revision on the PCB, save the original chip contents, and verify that image size equals chip capacity.
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 @biositechyangiyer. 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.