Tiny ZIP archive labelled P150-2851V6.2, only 222 bytes in size. The name gives no brand or device type, and a file this small can hold almost no data, so it is most likely empty, a link or a text note rather than real firmware or a schematic. P150 and V6.2 may be a model and a version, but the name does not confirm this. Check the contents before relying on it, and look for a full-size dump or document that matches the hardware actually on the bench.
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 @DumpFileFlashUpdate4. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Built-in OS tools7-Zip