Bucket
A bucket is a container for objects. Amazon S3 stores data as objects within buckets. An object consists of a file and optionally any metadata that describes that file.
For each bucket, you can control access to it (who can create, delete, and list objects in the bucket), view access logs for it and its objects, and choose the geographical region where Amazon S3 will store the bucket and its contents.
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For more information on creating and configuring an S3 bucket, see http://docs.aws.amazon.com/AmazonS3/latest/user-guide/create-configure-bucket.html.