Traditionally, PSX games are stored as files. While accurate, this format is uncompressed and often messy, resulting in multiple .bin files for games with Redbook audio (like Castlevania or Ridge Racer ).
If you are looking to "develop a feature" for a project (like a launcher or a personal library manager), you can automate the conversion of existing BIN/CUE files into CHD using the chdman tool from the MAME project. Core Conversion Logic psx chd japan full
One of the best parts about the CHD format is its performance on "Optical Drive Emulators" (ODEs). While the original hardware can't read CHDs, modern solutions like the or the PSI-IO thrive on organized folders. Using CHDs makes navigating your SD card significantly faster because the system has fewer files to index. Final Thoughts Traditionally, PSX games are stored as files