In One Minute : Amazon S3

Amazon Simple Storage Service is a service offered by Amazon Web Services that provides object storage through a web service interface.

Amazon S3 uses the same scalable storage infrastructure that Amazon.com uses to run its e-commerce network.
Amazon S3 can store any type of object, which allows uses like storage for Internet applications, backups, disaster recovery, data archives, data lakes for analytics, and hybrid cloud storage.

AWS launched Amazon S3 in the United States on March 14, 2006, then in Europe in November 2007.

The basic storage units of Amazon S3 are objects which are organized into buckets.
Each object is identified by a unique, user-assigned key.
Buckets can be managed using the console provided by Amazon S3, programmatically with the AWS SDK, or the REST application programming interface.

An object in S3 can be between 1 byte and 5TB. If an object is larger than 5TB, it must be divided into chunks prior to uploading.
When uploading, Amazon S3 allows a maximum of 5GB in a single upload operation; hence, objects larger than 5GB must be uploaded via the S3 multipart upload API.

Official website :- http://aws.amazon.com/s3/