FileDownloadTask A task that downloads bytes of a GCS blob to a specified File.
 Storage Storage is a service that supports uploading and downloading large objects to Google Cloud Storage.
 StorageMetadata Metadata for a StorageReference.
 StorageReference Represents a reference to a Google Cloud Storage object.
 StorageTask A controllable Task that has a synchronized state machine.
 UploadTask A controllable task that uploads and fires events for success, progress and failure.