Install the latest version of 7-Zip. (On Mac, you can use Keka or The Unarchiver ).
were you expecting the file to contain (e.g., a game mod, a dataset, software)? jp_sns.7z.005
You cannot open or extract jp_sns.7z.005 on its own. It only contains a small portion of the total data. How to Extract Split Archives (Step-by-Step) Install the latest version of 7-Zip
7-Zip will automatically recognize the other parts ( .002 – .005 ) and join them together to extract the final contents. Troubleshooting Common Issues a game mod