Use .chd as these are full disc rips but compressed. They can be used without needing to decompress.
If needed, you can convert .gdi to .chd.
Don’t use .cdi, these are lossy rips designed for burning to CD-R. They usually have data removed.
If needed, you can convert .gdi to .chd.
Don’t use .cdi, these are lossy rips designed for burning to CD-R. They usually have data removed.