If any part is missing or has a different file size (except possibly the last one), the extraction will fail with a "Checksum Error" or "Missing Volume" message. 2. Extracting the Files You do need to extract each part individually. Software: Use WinRAR or 7-Zip .
Do you have of the archive ready in your folder?
Multipart archives work like a puzzle. You need every single piece in the same folder for the extraction to work.