This question already has an answer here:
I have a very simple request, I want to download all my data, or at least all my photos, from iCloud to a local drive, and then I can do whatever I want with them.
The instructions here:
don't work - unless I am missing something. When I choose Import, I see all pictures all through, and I just want to download from Photos those that are on the cloud.
For Google, it is very easy, you just go to Google checkout, and get a ZIP file with all YOUR data. How can the same be done with Apple ID?