Based on the naming convention, this compilation appears to be an archive of .pdo (Pepakura Designer) or .pdf files consolidated into a single downloadable package.
If you want a genuine paper model compilation to buy, search for "paper model bundle" on Etsy or eBay – many sellers offer legal collections of their own designs or out-of-print models.
: Look for "compilation" files that feature high part counts (often 500+ pieces). These typically include complex machinery like tanks, architectural landmarks, or spacecraft. Upscale the Printing
If you successfully locate a verified archive (circa 2023–2024 re-releases), expect approximately 14–22 GB of data organized into six key folders: