After a session of tracking audio, you will most likely have a lot of audio that was recorded but is no longer used. Remember when you punched in over your track? The audio you recorded over is still on your hard disk, eating up precious space. There are certain advantages to keeping this audio around. For example, if you need to, you can always go back to a previous recording by finding the file in the Audio window and adding it to your arrangement. However, when the recording is done and you're happy with the result, it's a good idea to clean the unused (and unwanted) recordings off your system to free up disk space for . . . well, more recordings! The steps in this exercise show you how to do this cleanup easily, without accidentally throwing out something you need.