Joey wants to know about Amazon's AWS and S3 storage. He can't figure it out. Leo says that there are several levels of S3 storage, including Glacier. And S3 is used by DropBox and others as their back end. It's a bit techy, but it's designed for home use. Fast to backup, but very slow to download and restore. It's like cold storage. It's become the biggest part of Amazon's business, with over a third of cloud services run by AWS.
Amazon also offers cloud computing, with such services as Macintosh in the Cloud, and others.