ADF 

• A performant, robust, and cost-effective mechanism to migrate data at scale from Amazon S3 to Azure Blob Storage or Azure Data Lake Storage Gen2.
• Offers a serverless architecture that allows parallelism at different levels, which allows developers to build pipelines to fully utilize your network bandwidth as well as storage IOPS and bandwidth to maximize data movement throughput for your environment.
• Successfully migrate petabytes of data consisting of hundreds of millions of files from Amazon S3 to Azure Blob Storage, with a sustained throughput of 2 GBps and higher

Reference

Migrate data from Amazon S3 to Azure Storage – Azure Data Factory | Microsoft Docs

https://docs.microsoft.com/en-us/azure/data-factory/connector-amazon-simple-storage-service