moving photos from amazon to icloud
My photos are currently stored in AmazonPhotos. If I start to use iCloud photos, can I move my photos to iCloud and how do I do it? Usually when I share a photo from AmazonPhotos, it gives a link to my photo online, not the actual photo unless I copy it back to my photo gallery. It's a tedious extra step when there are thousands of photos in my gallery.
iPhone SE, iOS 10