Setting up USB external drive to sync with itunes

I have been trying to set up the USB external drive following the wiki instructions-

http://wiki.atvflash.com/index.php?title=USB_Primary_Storage

as I want to sync itunes onto my ATV. The ATV is only 40Gb and I want to utilise my attached 1TB. Everything else appears to be working fine on ATV flash and my ATV i.e. I can access movies etc but want to make the external drive the primary storage.

When going through the instructions from wiki, I keep getting the following error in terminal after entering the command “ssh frontrow@appletv.local”

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that the RSA host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
3e:26:ed:a4:88:91:df:5b:f7:37:70:75:fd:64:e6:49.
Please contact your system administrator.
Add correct host key in /Users/Username/.ssh/known_hosts to get rid of this message.
Offending key in /Users/Username/.ssh/known_hosts:1
RSA host key for appletv.local has changed and you have requested strict checking.
Host key verification failed.
Home-MacBook-Pro:~ Username$

Can anyone help me through this???

This gets rid of your saved SSH sessions, go into Terminal and type this:

rm .ssh/known_hosts

Thanks very much…great help.