The .part1 suffix identifies this as the first piece of a multi-part set. You cannot fully extract the contents unless you have all subsequent parts (e.g., M02.part2.rar , M02.part3.rar ) saved in the same folder.
The file is the first segment of a split Roshal Archive (RAR) , a high-quality compressed file format typically created using WinRAR. This naming convention indicates that a larger original file was broken into smaller "volumes" for easier sharing, storage, or to bypass upload size limits. Key Characteristics M02.part1.rar
RAR archives use advanced compression algorithms to reduce file sizes more efficiently than standard ZIP files. M02.part1.rar