: Once all parts are joined, the archive usually contains the game's executable ( .exe ), assets (textures, audio, models), and engine files required to run the application. Security & Technical Notes

: If you encounter a "corrupt volume" error while opening part 4, it usually means either one of the other parts is missing or that specific part was not downloaded completely. How files got corrupted - Recovery Toolbox

: A .rar file is a compressed archive. The "part4" designation means it is the fourth segment of a larger file. You cannot typically open or extract "part4" on its own; you must have all preceding and succeeding parts (part1, part2, part3, etc.) in the same folder to successfully extract the contents.