The Transfer > Send menu command begins the process of transferring the selected local folders or files to a selected location on the host computer. While the transfer is in progress, the File Transfer Status - Sending dialog box appears to keep you updated.
The Transfer > Send command function can be duplicated by the following:
toolbar button
Alt + T, S key sequence
F8 short cut key
Note: the last four file transfers are maintained in a list on the Transfer menu. This is handy for frequently used file transfers.