It reduces file size without losing any data.
Run the command: chdman createcd -i "Sturmwind.gdi" -o "Sturmwind.chd" . Wait for the verification process to finish. sturmwind dreamcast chd
Move the resulting .chd file to the GDI or Games folder on your SD card. Playing Sturmwind on Modern Systems Once you have your CHD file, you have several ways to play: On Original Hardware (GDEMU / MODE) It reduces file size without losing any data