I've changed the directory where I save my ROMs, to a 64gb USB stick which is permanently mounted. How do I add directories to the FTP server so I can FTP directly to the stick rather than the default PiPlay directory?
depends on which ftp software that you use. filezilla: just click the site manager icon (upper left, picture of a computer), select the 'advanced' tab for your connection, then set 'default remote directory'