If you want to have quick access to your cloud storage, then for this you need additional software that has access to Amazon's powerful cloud service.

Commander One will help you - a comprehensive solution that performs many functions, especially FTP and s3 Mac connection.
It has a clear user interface and also several ways to connect to S3 servers do.

You can review this article https://ftp-mac.com/mount-amazon-s3-mac/ and learn more information.