Is there a free application available for OSX that allows one to create auto-syncing folders (much like a Windows briefcase)? I have a media folder on my blackbook hard drive that holds all my music, recorder TV shows, videos and photos. This one is continuously being changed (add/delete, rename, edit, etc). I want to have the ability to have some sort of auto-syncing method set up so that this folder syncs to my external hard drive when I connect it . In addition to my usual Time Machine Backups. Thanks in advance!