FTP to a connected HD

I have ATV installed, works fine. I can FTP to it. I have a HD connected to it (named LaCie). I can play the files on it through ATV no problem (files>places>LaCie). What would be the path to use to FTP files to it?

I have a LaCie connected to my Apple TV. A folder alias (shortcut) of the LaCie shows up under the “Movies” folder on my Apple TV. I used Cyberduck on a mac and just dragged and dropped files onto the LaCie folder.