CHD (Compressed Hunks of Data) for Sega Saturn ROMs is widely considered the modern gold standard for library organization and emulation. Originally developed for MAME, this format significantly reduces file sizes while maintaining a perfect, lossless backup of the original game data. Core Review & Performance Storage Efficiency : CHD files can reduce a standard Sega Saturn
Introduction
Furthermore, a standard Saturn game takes up 500MB to 650MB. If you want a library of 200 games, you are looking at 120GB+ of cluttered, slow-to-read chaos.
- The Law: In the US and EU, downloading a copyrighted commercial game you do not own a physical copy of is copyright infringement. Sega, historically, has been litigious about ROM distribution (though they have softened via Sega Forever mobile ports).
- The Reality: The Saturn is a dead platform. Many games are abandoned ware (no digital storefront exists). Copyright for Saturn games will expire between 2080 and 2100 depending on the territory.
- The Compromise: If you want to be 100% legal: Buy the original disc (check eBay auctions for Japanese imports – they are often $10 vs $300 for US copies), rip it yourself to BIN/CUE using ImgBurn, and convert to CHD.
Verification: Once finished, you can delete the original files to save space. Where to Find Pre-Converted Files