AWS S3 (Simple Storage Service) offers scalable and durable cloud storage for storing and retrieving any amount of data at any time. The pricing for AWS S3 storage is based on several factors, including the following:

1. Storage Usage: AWS charges for the total amount of data stored in S3. The pricing is based on the per-gigabyte (GB) storage usage per month. The storage usage includes both the original objects uploaded to S3 and any additional copies created, such as replicas for data durability or object versioning.

2. Storage Classes: AWS S3 offers different storage classes, each with its own pricing. The available storage classes include Standard, Intelligent-Tiering, Standard-IA (Infrequent Access), One Zone-IA, Glacier, and Glacier Deep Archive. The storage class you choose determines the availability, durability, and retrieval options, as well as the associated pricing.

3. Request and Data Transfer Pricing: AWS charges for the number of requests made to S3 and for data transfer in and out of S3. Requests include operations such as GET, PUT, COPY, and DELETE. Data transfer charges apply when transferring data between S3 and other AWS services, as well as data transfer out to the internet.

4. Data Retrieval: For certain storage classes like Glacier and Glacier Deep Archive, there are retrieval fees associated with accessing and retrieving data. These fees vary based on retrieval speed, frequency, and the amount of data retrieved.

5. Additional Features: AWS S3 offers additional features, such as cross-region replication, data transfer acceleration, and event notifications. Some of these features may have associated costs depending on their usage.