When you see a file named index.html appearing during an .xzm download, it usually indicates a or a server-side redirect : How does .xzm files actually work - Porteus forum
This allows users to carry their entire operating system and applications on a tiny USB stick, adding or removing features just by moving files into specific folders like /porteus/modules . 2. Why "index" and "xzm.html"? index download xzm.html
It is a compressed module format (specifically a SquashFS filesystem compressed with LZMA2). When you see a file named index