if (dfsCredentials instanceof AmazonS3DFSCredentials) {
            AmazonS3DFSCredentials amazonS3DFSCredentials = (AmazonS3DFSCredentials) dfsCredentials;
            return new SimpleDatasafeServiceImpl(
                amazonS3DFSCredentials.toBuilder().rootBucket(
                    amazonS3DFSCredentials.getRootBucket() + "/" + subdirBelowRoot