The exact contents are unknown without extracting the file. It could contain anything, such as a dataset, game files, documents, or media.
Based on the file naming convention, is the first part of a split 7-Zip compressed archive . SS-Nin-030_s.7z.001
You must use 7-Zip or WinRAR to open the first file (.001) and extract the entire content. The exact contents are unknown without extracting the file
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 such as a dataset
To help you further, do you have the other parts of this archive (like .002 , .003 ) in the same folder? How to Extract .7z.001 files - Microsoft Q&A