A 3.66 MB RAR archive named a2010, with no brand, model family or document type stated. The code alone does not identify the device reliably, so the contents must be checked after unpacking to establish what it covers. Archives of this kind often contain schematics, layout files or firmware for a phone or small board. Use 7-Zip or WinRAR to extract, then read title blocks or file headers, and confirm that the board marking on the hardware matches before tracing circuits or flashing anything.
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 @Schematic_mobile_iran. 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.