RAR archive of 294 KB labelled only with the model code A715-73G, which matches the Acer Aspire 7 naming, although the name states no board number or file type. At this size it most likely contains a boardview, a small firmware file or notes rather than a full schematic, so extract it and inspect the contents before use. Whatever is inside, compare the board number silkscreened on your motherboard with any number found in the files, since one model name is often shared by several board revisions.
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 @vinafix_bios. 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.