How do I delete all pictures in my Lightroom catalog from disk that are not part of any collection
I have created a large lightroom catalog with all my individual photos from projects over many years. After importing my photos into the lightroom catalog I then create one or more collections to sort the photos im more logical subcollections. I then start editing from there. If a photo is rejected I delete it from the collection resulting in a usable set of photo's once I'm done. This works fine for me but now I realised I have a lot of clutter on my hardisk from rejected photo's that will neveer be seen or used again. I would like to clean up these rejected pictures from my harddisk so I am looking to find a way to delete all pictures in my lightroom catalog from disk if they are not used in a collection. Any input would be highly appreciated. Thanks a lot
