To view or extract the contents, you need all parts of the archive (e.g., 001, 002, ...) in the same folder.
You must use 7-Zip or WinRAR to open the first file (.001) and extract the entire content. SS-Nin-030_s.7z.001
7zip file with numbers on it like 001 means that you only have a part file of the whole compressed file. Microsoft Learn How to Open and Extract .001 Files - Microsoft Q&A To view or extract the contents, you need
Based on the file naming convention, is the first part of a split 7-Zip compressed archive . To view or extract the contents