Why .001 contains the archive header while subsequent parts ( .002+ ) consist primarily of raw compressed data.
If you are researching this for , cybersecurity , or legal investigations , a paper on this topic would typically focus on the technical analysis of multi-volume archives or the forensic tracking of peer-to-peer (P2P) file sharing. Russians boys.7z.002
Below is a conceptual outline for a technical research paper: or legal investigations