: Likely refers to a 4-day event or series from the year 2020.

: Missing even one part will prevent the extraction from finishing.

: Ensure you have every single part of the set (Part01, Part02, Part03, etc.) saved in the exact same folder on your computer.

: This usually means one of the parts (like Part 03) was corrupted during download. You may need to re-download that specific part. Final Thoughts

Below is a draft for a technical blog post explaining how to handle this specific file type and what it represents. Handling Multi-Part RAR Archives: The 4dias 2020 Collection

Based on the naming syntax, we can break down exactly what this file contains: