Whats a backup seed? sorry im a newbie 
Exactly what you said above. Your list of words (P.S: order matters; you need to write the exact words in the exact order).yeah i did that already, but if i lose my Ledger, and buy a new one. How can I enter the same words on the new device? will they propose me the same list of words to choose from? that's the part i dont undertsand.