This is a split archive part. To open or extract its contents, you generally need all parts of the set (e.g., SS-LilSS-004_v.7z.001 , 002 , 003 , etc.) in the same folder.
Do you have the of this archive (like part .001) saved in the same location? SS-LilSS-004_v.7z.002
The "SS-LilSS" prefix is often associated with specialized asset packs or mods in gaming communities (e.g., "Lil' Sims" or similar user-generated content). This is a split archive part
If you did not download this from a known, trusted source, you should treat it with caution. You can check the safety of your specific file by uploading it to VirusTotal , which will scan it against dozens of different antivirus engines. SS-LilSS-004_v.7z.002