If I transfer all of my photos from my external drive into the iCloud Photo Library, will I always have access to the fullsize original photo file when I want to print or use it in any way? I have heard that what becomes available on each of my devices (MacBook Pro 2010, iPad Air, iPhone 6) would be smaller files for easier viewing or access. But I want to be sure I can get those full files when I want them. And will any photo taken on any device immediately be available on all devices? And if I want to delete a photo (from everything), can I do that easily by deleting it from one? Thanks.