: You must have every single numbered part (e.g., part1 through part10) in the same folder . If any part is missing or renamed differently, the extraction will fail.
: Ensure part 5 is the same size as parts 1 through 4. If it is significantly smaller (and isn't the very last part of the set), the download may be corrupted. Safety & Verification
: If WinRAR asks for this, it means it cannot find the next part (part 6) in the same directory.