From: http://aws.amazon.com/s3/faqs/#How_durable_is_Amazon_S3 http://aws.amazon.com/s3/faqs/#How_durable_is_Amazon_S3 Amazon S3 is designed to provide 99.99999

From: http://aws.amazon.com/s3/faqs/#How_durable_is_Amazon_S3 http://aws.amazon.com/s3/faqs/#How_durable_is_Amazon_S3 Amazon S3 is designed to provide 99.999999999% durability of objects over a given year. This durability level corresponds to an average annual expected loss of 0.000000001% of objects. For example, if you store 10,000 objects with Amazon S3, you can on average expect to incur a loss of a single object once every 10,000,000 years....