Since the movie is likely 50GB+, you need at least 100GB of free space (50GB for the .rar parts and 50GB for the extracted movie).
The file is a specific data fragment belonging to a high-quality "REMUX" digital copy of the 2021 film The Last Duel (Spanish title: El último duelo ). elultimoduelo2021remuxg36.part29.rar
If you try to extract the movie and get an error specifically pointing to part29 , it means this specific file is corrupted. Since the movie is likely 50GB+, you need
Delete part29 and re-download only that specific file. You do not need to re-download the entire movie. Since the movie is likely 50GB+