A method and apparatus for transferring buffered enhanced uplink (EU) data is disclosed. The WTRU transmits an EU data transmission request message. The WTRU determines, based on the EU data scheduling message, whether granted resources allow for the amount of EU data stored in the buffer to be transmitted and transmits a portion of the EU data stored in the buffer along with an indication indicating whether the granted resources allow the amount of EU data stored in the buffer to be transmitted.