Archive whose name gives only MA10 and R2.2, likely a board code and revision, without brand or device. At 230 KB the RAR is small, so it may contain a boardview, a short firmware image or a schematic, and the content must be checked after extraction. Do not assume a match just because the code looks similar to your board. Compare the number and revision printed on the PCB, and if the file proves to be a firmware dump, back up the original chip and check its size against the flash 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 @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.