If your images or PDFs are indexed, others can easily scrape your content or link directly to your files, stealing your bandwidth. How to Fix or Disable Directory Indexing
Eli laughed nervously. "Someone had a sense of humor," he whispered. He clicked it. index of parent directory
IIS uses a feature called "Directory Browsing." It is disabled by default in modern versions, but legacy servers may have it enabled. If your images or PDFs are indexed, others