The iCloud service stores your important data such as photos, files, backups and All this can then be accessed using any of your Apple devices, or on the web at . You can also use iCloud to sync information such as notes, contacts, Safari favourites, reminders, wallet info and more across your Apple gear. Write a note on your iPad, and you can review it on your Mac and iPhone. Add a contact on your iPhone, and it also appears on your Mac and iPad.
