GridFTP is a very efficient protocol for transferring data, it enhances the standard ftp service making it more reliable and faster. It is being developed by the Globus alliances and is part of an open-source toolkit for HPC application management.
Refer to globus-url-copy page if you want a command line tool for transfer data using GridFTP protocol, or Globus Web App (previously name GlobusOnline) page if you prefer a web browser GUI.