RAR archive of about 5.18 MB linked to the Dell Latitude 3570 and the Inspiron 15 3559, two models the name groups together. The contents are not specified; the size suggests a BIOS dump or a collection of service files such as a schematic and boardview. Unpack it and identify each file before working on the board. Shared files are common when two models use the same mainboard, but the board number printed on the PCB should still be checked against any document or image inside, and the original flash should be backed up before reprogramming.
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.