You cannot extract the contents from DarkkkSerie.7z.003 alone. You must have in the same folder.
Splitting a large archive ( .7z ) into smaller chunks ( .001 , .002 , .003 ) allows for easier uploading, downloading, or transferring of files that exceed typical file-size limits. DarkkkSerie.7z.003
This usually means one of the parts is corrupted or incomplete. Re-download the parts. You cannot extract the contents from DarkkkSerie
If you can tell me you're getting, or what software you're using to try and open it, I can help you fix it. .003 ) allows for easier uploading