Quanta ED5 package in RAR format, 886 KB. ED5 follows Quanta's two or three character project code style, where the code is printed on the motherboard together with a revision marking. The name does not state whether this is a schematic, boardview or BIOS. Quanta schematics are commonly used to trace rails and power sequencing. Compare the project code and revision on the PCB with ED5 before relying on the file, and back up any flash chip before writing firmware.
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 @IT_SERVICE_WORLD. 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.