RFT, grid data transfer component, provides a reliable file transfer service, but the RFT in GT4 is still deficient. It does not support the xml configuration file, and can not be globally optimal allocation, and has not visual manipulation. Based on the study of GT4 RFT component, we designed and implemented a visualized reliable file transfer tool - ERFT. Experimental transmission of large files show that, ERFT inherited the RFT's traditional strengths, while improving its shortcomings, provides users with more reliable and friendly file transfer services.