| Data type | Purpose | Main reason to preserve |
|---|---|---|
| Cache | Faster loading and offline data | Expensive download or rebuild |
| Log | Activity and error records | Current troubleshooting |
| Crash report | Failure diagnosis | Support or debugging |
| Temporary file | Work in progress | Active task or recovery |
| Index | Fast search or navigation | Long rebuild time |
| Thumbnail or preview | Quick visual display | Slow regeneration |
| Update data | Installation preparation | Active or recoverable update |
Labels alone do not establish safety. Review the owner, current activity, age, path, and whether the data can be recreated.
Quit the owning app before removal and preserve current diagnostics until an issue is resolved.