Would someone please explain to me how Norton Antivirus' online backup works? Where exacty "online" is the data stored? How can I retrieve stored data? Is it possible to retrieve stored data from one hard drive that has been replaced with another?

Thank you for your response.

Here's a link to the Norton's website where's you'll find FAQs
And a link for personal assistance if you are already a
Customer:

Norton Software Direct - Help