Back up (without shortcut)

hello, :
1-does box drive support backing up to an external hard disk automatically? 

2-I tried to make a Box Drive folder available offline and copy it to the external hard drive, but then when I made changes to the folder on the external hard drive, the changes were also made to the folder on the Box Drive! there seems to be a link! I don't want bi-directional communication, I want the folder from the Box Drive to go to the hard drive and not the other way around (because if I delete the folder on the hard drive to free up space, it deletes the folder on the Box Drive)
3-where do the folders made available offline go on my pc? because i can't find them
thanks