With this sub-panel you can instruct DiscJuggler to automatically exclude files, when performing drag-and-drop operations, based on specific extensions or date.

By type:

Here you can select files types you do not wish to include. To exclude a file type, click the gray rectangle with the yellow star, then type in an extension. This option is useful to automatically exclude old or temporary files when dragging-and-dropping entire sub-directories. To exclude these files, click the gray rectangle with the yellow star, then type for example "bak" or "tmp", without the quotation marks, and press the <Enter> key.

By modified date:

By enabling this option and specifying a time interval you'll prevent files modified within this range to be copied to the disc.