Boardview package for the HP ProBook 5330m, packed as a RAR archive of about 1.9 MB. The name also carries the token QDF11, which looks like the motherboard project code and can be compared against the silkscreen on the PCB. A boardview shows component placement, part designators and net connections on both sides of the board, so you can find a capacitor or test point quickly while probing. Open the extracted file in a viewer such as OpenBoardView or FlexBV, and confirm the board revision matches yours.
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 @alischematics. 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.