Files in this format are typically 30–70% smaller than standard ZIP files, making them ideal for storing large datasets or sensitive information.
"Aurora" and "Red" could relate to atmospheric research data concerning Red Aurora phenomena, which occur at high altitudes due to oxygen excitation. Security Warning AuroraRed.7z
This indicates it was created using 7-Zip (or a compatible tool), an open-source archiver known for high compression ratios and strong AES-256 encryption . Files in this format are typically 30–70% smaller