If you plan to store your documents for over three years, I recommend using Amazon Glacier S3 to the fullest extent possible. This is because the longer you store your data in the tool, the more you pay. By moving most of your objects to Glacier, you can save money. Additionally, you can use Reserved Capacity to save even more money. Retrieving data from Amazon S3 Glacier is relatively easy. It is easier than retrieving data from the tool. So, I think people should use the product as much as possible. Overall, I rate the solution a nine out of ten.