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
Have you ever downloaded a file only to find it has a strange extension like .001 ? Specifically, if you’re looking at , you aren't looking at a corrupted file or a mystery format. You’re looking at a split archive . What is a .001 file?
You cannot simply double-click the .001 file and expect it to work like a standard folder. You need a dedicated extraction tool.
: Ensure every numbered part of the archive is in the same directory. If a part is missing, the extraction will fail.