Mega/Sega CD files - Are these surplus to requirement?

[JudgeDrokk]

With regard to usung the correct files for MegaCD / Sega CD on MiSTer...
Inside the game folder with CUE/ IMG or CUE/BIN does it matter that there's a .SUB and .CCD file in the same
folder for each game or in some instances a .wav alonside a .BIN?

Should I avoid such a set on MiSTer?

Thanks