Gp.7z -

: Use a hex editor to check the first few bytes. A valid 7-Zip archive must start with the characters 7z¼¯' .

: If the file is only a few KB but should be a large game patch, it may be a partial download. : Use a hex editor to check the first few bytes

Because .7z is a specialized compression format, your computer’s default "Unzip" tool may not work. : Use a hex editor to check the first few bytes