: You only need to initiate the extraction from the first part.
: 7-Zip will automatically detect and combine the subsequent parts to reconstruct the original data. Regarding a "Proper Post" SS-MaiSS-016_s.7z.001
: Maintaining the original naming convention to ensure software like 7-Zip or WinRAR can link the volumes correctly. Do you have all the numbered parts for this specific file? : You only need to initiate the extraction