Uninformative archive named landrex, a 106 KB RAR with no model, board or version stated. Its size suggests a small firmware image such as an EC or keyboard-controller dump, but only opening it will tell. Judging by the files filed alongside it, it may relate to Quanta VM8 boards, yet this is not confirmed by the name. Before using anything inside, identify the target chip and board, save a full read of the original contents, and check that the image size matches the chip.
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 @schematicslaptop. 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.