A file ending in .part1.rar indicates that a larger dataset was split into smaller chunks for easier sharing or storage.

: The "part1" designation means this is the first segment of the archive.

: Ensure DutchMitching.part1.rar , DutchMitching.part2.rar , etc., are in the same directory. Select Part 1 : Right-click on the first file.

: If the extraction fails with a "Checksum Error," one of the parts is likely corrupted and needs to be re-downloaded.