hi
i have a f5 skybox, i just plug in a memory stick into the usb in the back of the unit!. then the usb device is detected as indicated on the screen.
then basically all i do is select the channel and press the record button !the stop pause etc. buttons are there on the remote
i am sure the f3 is the same .it work well, but does not give you the option to automatically stop recording at the end of the programme
cheeres