Duplicate copy of the R13 archive, marked as the second copy, with the same 4.97 MB size as the other R13 files. The name reveals nothing about the brand, model or contents, so treat it as an unidentified package until opened. Use WinRAR or 7-Zip to extract it and compare its files with the other copies; identical contents mean only one needs keeping. Check that any schematic or BIOS inside matches the board number and revision on the PCB, and back up the original chip before flashing.
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 @hrtechno. 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.