Boardview archive named SPEEDY 2.1, with the name indicating the layout is in FZ format; the RAR is 200 KB and states no brand or board number. FZ boardview files are commonly opened with tools such as FlexBV or OpenBoardView and show part placement, pin nets and test points across both sides of the board. Use it alongside a schematic to locate components while measuring. The 2.1 figure may be a revision, so verify it against the PCB silkscreen before relying on placement.
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 @cyberlanelectonik. 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.