ZIP archive of 13.3 MB named 55U5570, with no brand listed and no further detail in the title. The token looks like a model code, possibly a 55-inch television, but that cannot be confirmed from the name alone, so the contents should be inspected after extraction. At this size it may hold firmware, a service manual or schematics. Check the model sticker and mainboard markings of the unit against whatever is inside before flashing any software or relying on diagrams for repair.
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 @gunvantrathore. Enginerys does not host this file.
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Built-in OS tools7-Zip