BIOS package for the ASRock B150M Pro4 V motherboard, version or revision 1.02 according to the name, in an 8.99 MB RAR archive. Extract it to see whether it holds an official update file or a full SPI dump suitable for a hardware programmer. ASRock boards often use a socketed or SOIC-8 flash that can be reprogrammed off-board. Check that the board is exactly the Pro4 V model, save the existing chip contents first, and confirm the image size matches the flash capacity before writing.
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 →