Check that a LAN cable is connected to the LAN port of this machine via the network.
Check that an IP address is assigned to this machine. Tap [Utility] - [Device Information], and check that an IP address is displayed.
If no IP address is displayed, you need to configure the network. For details, refer to Here.
Enable the FTP Send function. (You can use this function with the default settings unless otherwise requested.)
How to configure the setting is explained using Web Connection. For details, refer to Here.