: Ensure every numbered part of the archive is in the same directory.
: 7-Zip will automatically detect and join the other parts to extract the full content. Alternatives by Device How to extract part files 001 using 7zip on windows (2026) 21085.7z.001
: Right-click specifically on the file ending in .001 . Extract : Hover over 7-Zip in the context menu. Choose Extract Here or Extract to "[Folder Name]" . : Ensure every numbered part of the archive