A1029.7z.004

Use The Unarchiver or similar tools that support multi-volume 7z files.

Right-click only on the first file (the one ending in .001 ). Extract: a1029.7z.004

Use the 7-Zip tool. Select "Extract Here" or "Extract to 'a1029'/" from the 7-Zip context menu. Use The Unarchiver or similar tools that support

Since you mentioned it is a "solid guide," the archive was likely created as a "solid archive," which improves compression by treating all files as one continuous stream. This means if any single part (like .002) is missing or corrupted, you cannot extract any of the guide's contents. a1029.7z.004