iCloud
https://gyazo.com/0c683d0e50b11f1e8ffedf0a626d9c65
Export photos, videos, and slideshows from Photos on Mac - Apple Atbalsts
Tip: If you’re signed in with your Apple ID and have iCloud Drive turned on, you can export photo files to iCloud Drive, then access them from any Mac, iPhone, iPad, or Windows PC set up to use iCloud Drive. See Use iCloud Drive to store documents.
https://gyazo.com/e051f9d75bec3316d8dabd934939b93c
写真 Appから進捗確認できる
iCloud の写真やビデオをダウンロードする - Apple サポート
https://www.icloud.com/photos/