BIOS firmware package for an MSI board identified as MS-B062, with the sub-variant MS-B0621 and PCB version 2.1 given in the name. The 2.83 MB RAR archive should hold the SPI flash image for that board, possibly with notes. MS- numbers are MSI's own board codes, so read the silkscreen near the slots to confirm both the model and VER 2.1 before flashing. Dump and save the original chip contents with a programmer such as a CH341A first, and check that the image size matches the flash 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 @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 →