Some malicious files use "disk filling" techniques to appear as 66 GB to bypass certain antivirus scans, while the actual malicious code is only a few kilobytes.

This could be a "Full" (as the keyword suggests) collection of a creator's entire digital history. The Risks of Downloading Large, Unknown Files

If you are determined to find this specific archive, follow these best practices:

Always prioritize your cybersecurity over the curiosity of a "Full" download.

Approximately 4-6 hours of high-bitrate 4K footage.