Delete file after deleting item from NGS repository

Hi,

The 'Delete Item from Repository' component in the NGS collection has, by default, the parameter 'Delete File' set to False.  This means that when you delete an item from the repository, all you are deleting is a reference to it, not the actual file.  I would like to delete old files from the repository that are no longer being referenced, but I don't know which ones because of their naming convention (random file names).  Is there any way to clean up these items from the repository?

Thanks,

Liz