Archive labelled ASUS F2A55, 226 KB RAR, whose name gives no suffix or document type, so the exact board variant is unclear. The F2A55 family pairs the AMD A55 chipset with socket FM2 APUs. Contents are most likely a boardview, viewable in OpenBoardView or FlexBV for component location, net tracing and test-point selection. Because several F2A55 variants exist, compare the full model name and revision printed on the PCB with the extracted data before using 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 @boardview. 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.
7-ZipWinRARThe Unarchiver (macOS)