The TransferStatus enumerated type defines the transfer state of a file.
WAITING_FOR_TRANSFER : Indicates that a file has been defined for a library item and its content needs to be uploaded.
TRANSFERRING : Indicates that data is being transferred to the file.
READY : Indicates that the file has been fully transferred and is ready to be used.
VALIDATING : Indicates that the file is being validated (checksum, type adapters).
ERROR : Indicates that there was an error transferring or validating the file.
Enumeration: WAITING_FOR_TRANSFER, TRANSFERRING, READY, VALIDATING, ERROR,