Want to backup automaticly

Hi Guys

I’m a bit lost. I Tried to look into other topics but i’m a total noob unfortunatly.

  1. If i backup by hooking up an external hd to the mycloud then the next time i back it up. Will it backup everything or just the new images?
  2. I backed up once with an external but the second time mycloud did not recognize the external?

How do I acces mycloud trough nas? It only connects via internet.

Thanks in advance


User Manual: My Cloud Home and My Cloud Home Duo (westerndigital.com)