Objects are stored in buckets. The bucket provides a unique namespace for management of objects contained in the bucket. Each bucket you create is owned by you for purposes of billing, and you will be charged storage fees for all objects stored in the bucket and bandwidth fees for all data read from and written to the bucket. There is no limit to the number of objects that one bucket can hold. Since the namespace for bucket names is global, each developer is limited to owning 100 buckets at a time.