Service archive named Adamo 13, most likely referring to the Dell Adamo 13 ultrathin notebook, though the brand is not stated in the name. It is a 781 KB RAR file with no board number or revision given. Contents are probably a schematic suitable for tracing rails, checking charger circuits and finding shorts on the compact board. Open it and check the drawing title block, then compare the board number on your PCB before relying on part values.
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.
7-ZipWinRARThe Unarchiver (macOS)