For the archive to work, you usually need all subsequent parts (e.g., PA02.7z.002 , PA02.7z.003 ) in the same folder. How to Open PA02.7z.001
: Ensure every numbered part of the archive is in the same directory. If a part is missing, the extraction will fail. PA02.7z.001
: Use 7-Zip (free and open-source) or PeaZip . For the archive to work, you usually need