In FME Server, it is currently possible to add a connection to an Amazon S3 bucket as a resource, but because the S3 Bucket is not mounted as a drive, these external resources can not be used as input or output data locations when running a job on FME Server.
When working with a large volume of cloud-based data, it would be helpful to be able to read from and write to the data without having to first copy the data into FME Server Resources.