Archive for a Zotac D2550ITXS-A-E mini-ITX board, with the brand misspelled as Zotak in the name and the file described as tested OK. At 1.11 MB it most likely holds a BIOS image, though the name does not say so outright, so open it and check the contents. A tested dump is typically written to the board's SPI flash with a programmer to recover a dead or bricked board. Back up the original chip first and confirm the board revision and chip size fit the 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 @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.
7-ZipWinRARThe Unarchiver (macOS)