An archive of repair files for Sony hardware. Shared as “LDD.H510.A SONY REMOTE_ 3840×2160.zip” — a .zip file, 360 MB.
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 @tvsoftwareworld. 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