Hi Brian,

If the transcoded files are not removed when a source file is removed from Mezzmo, then that's a bug. We'll look into it and fix it. Thanks for alerting us to it.

Mezzmo has automatic garbage collection for transcoded files in the transcoded folder. Once the your maximum folder size limit has been reached (set this in the Transcoding Settings dialog), Mezzmo automatically starts removing the oldest transcoded files.