Brian,
Thanks for this great information. I use Event Manager X, which moves projects and events between their regular folders and “Not In Use” folders in order to “declutter” the FCPX interface so it doesn’t load every project and event ever created. The downside of this is that it causes automated backup processes that backup these folders to copy large amounts of data whenever a project or event switches to or from a “Not In Use” folder.
To remedy this, based on your suggestion, I now have Carbon Copy Cloner do a nightly backup of my “Final Cut Events”, “Final Cut Events Not In Use”, “Final Cut Projects”, and “Final Cut Projects Not In Use” folders, excluding the subfolders you mention, to a new “Final Cut Files for Backup” folder. I backup this new folder, rather than the Projects, Events, and Not In Use folders, to my Time Machine volume and “the cloud”. (I keep my original media separately, and do not copy it into the FCPX event folders, so I do not have to backup any original media within those folders.)
Thanks again,
Howard