Comment by Johnny555

By default, Amazon S3 stores data across at least separate datacenters that are in the same region, but are physically separate from each other:

Amazon S3 provides a highly durable storage infrastructure designed for mission-critical and primary data storage. S3 Standard, S3 Intelligent-Tiering, S3 Standard-IA, S3 Glacier Instant Retrieval, S3 Glacier Flexible Retrieval, and S3 Glacier Deep Archive redundantly store objects on multiple devices across a minimum of three Availability Zones in an AWS Region. An Availability Zone is one or more discrete data centers with redundant power, networking, and connectivity in an AWS Region. Availability Zones are physically separated by a meaningful distance, many kilometers, from any other Availability Zone, although all are within 100 km (60 miles) of each other.

You can save a little money by giving up that redundancy and having your data i a single AZ:

The S3 One Zone-IA storage class stores data redundantly across multiple devices within a single Availability Zone

For further redundancy you can set up replication to another region, but if I needed that level of redundancy, I'd probably store another copy of data with a different cloud provider so an AWS global failure (or more likely, a billing issue) doesn't leave my data trapped in one vendor).

I believe Google and Azure have similar levels of redundancy levels in their cloud storage.