RAR archive of 3.66 MB named a2010, with no brand given and nothing else in the name to confirm which device or manufacturer it belongs to. The token might be a model number or an Apple-style model identifier, but that cannot be verified from the name alone. Extract the archive and examine its contents, such as schematics, boardview files or firmware, before use. Always match the board number printed on the PCB to the documents and keep a backup of any chip before writing data to it.
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 @tamirat_moobile. 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.