I recently created a shared album for my wife and I to share pics we are each taking from our iPhones on vacation. Rather than "airdrop me those pics" we're just adding to a shared photo album. Works great. When inspecting the photos, I noticed that the photos I was sharing were stored in HEIF format in my library but in JPG in the shared album. I was under the impression that a shared album was just done by manipulating permissions on the same file in iCloud but it appears that it created a second copy. Is that right? The pic in a shared album isn't the same exact file as the original file? As a secondary question, how can I make sure that the files I share in a shared album are also shared in HEIC (or HEVC if video)?