 This is part of their data transfer project. This is an open source initiative. A lot of the big tech companies are very slowly doing this, but they're trying to make it so that you have data portability between these companies. It is a very slow process. It's very limited, but we're seeing some progress. But if you have Google Photos, you can now transfer your collection directly to iCloud Photos without downloading it first. It will do it on the back end for you.