ix2-200 NAS and rsync

[ik]

Hello,

I have ix2-200 NAS, and I wish to start backpacking stuff using rsync,
but I can't find out what path it uses for it.
I created using web ui a directory named backup

I tried
rsync ... rsync at ip:~/backup/

I get an error message that the directory was not found, I triend it
as root directory, nothing, etc...
There is no ssh login, and I don't have time to start taking it apart
and working on the hd themselves.

So does anyone know how I can backup stuff using rsync ?

Thanks,
Ido