You cannot use default operating system tools to put split files back together. You need to download a free, dedicated extractor: Download the official 7-Zip software.
On , right-click pjk023.7z.001 , hover over 7-Zip , and select Extract Here or Extract to "pjk023" . pjk023.7z
If this is a split archive, file names usually look like pjk023.7z.001 , pjk023.7z.002 , and so on. 🗂️ Step 1: Gather All Parts You cannot use default operating system tools to