We are planning to transfer a large amount (12TB) of data from AWS S3 to Azure Blob storage. There are close to 60million objects to deal with and we are planning to use a tool <product name removed> for the same. Before proceeding, we want to estimate the transfer cost. Are there any 'write costs' to Azure blobs? We are aware of egress cost from AWS S3, but to calculate the complete end-to-end cost, we need to understand are there are any write operation costs during the transfer