RAR archive for the HP EliteBook 8570p. The name carries the Casper platform tag, and DIS points to the discrete-graphics variant of the board. The remaining tokens, cr and hpb, are not clear enough to expand with confidence. Unpack it to see what is inside: laptop service packs of this kind usually hold schematics or boardview data. Before probing, check that the board you have is the discrete-GPU version, since the integrated-graphics design differs in power and video sections.
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 @hrtechno. 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.