How do I select all photos at once to copy/move/delete from icloud instead of buying more storage

Hello keeruani,

If you would like more information on managing or deleting photos from iCloud Photo Library, you may find the information and steps outlined in the following article helpful:

Get help with your iCloud Photo Library - Apple Support

(Note: If you are not using iCloud Photo Library and are instead using the previous iCloud My Photo Stream, note that My Photo Stream does not use available iCloud storage space, as noted here)

Regards,

- Brenden