I have a mid 2009 17" macbook pro with OS 10.10.5. A few years ago I got an external hard drive for back up. When I first got the ext hard drive I used CopyCloner and since that time I have saved all my further photos to the ext hard drive and not to the mac itself. It seems that although all my photos from iPhoto made it in to Apple's newer "Photos" (which is on the ex hard drive) some of the picture's files reside only on my MacBooks drive and not on the ext hard drive. Can I go in to "Photos" and "export" these selected photos to my ext hard drive, or will that only export the icons and not the actual file?