: These indicate the volume or part numbers (Volume 1 and 2) contained within the archive.
In short, it represents a digital time capsule curated by an enthusiast group, usually focusing on preserving rare or "underground" German media.
: This is the file extension for a compressed archive, meaning the "story" is actually a collection of multiple files—likely music albums, high-quality scans, or specialized software—bundled together for easier downloading.
