Small 259 KB ZIP archive named OZ560EGN, with no brand, board or document type stated in the name. The token may refer to an O2Micro part number, but the contents are unconfirmed, so open the archive to see whether it holds a datasheet, firmware or other reference material. Files of this size usually contain a single PDF or a small binary. Verify the exact part marking on the component you are servicing against the documentation inside before relying on pinouts, values or any data image.
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.
How to open a .zip file
Compressed archive that every operating system opens without extra software.