Always look for community feedback or YouTube gameplay videos with active download links to ensure the file is legitimate. Conclusion
The "Storm 3" .zip files commonly found online for PSP/PPSSPP are total conversion mods.
If your goal is to play Naruto Shippuden: Ultimate Ninja Storm 3 specifically, and you want a portable experience, you have three modern options:
Sites that require surveys or "human verification" rarely provide the promised file. How to Play Naruto on PSP