I have all the .dar files and want to restore my rebuilt drives,

Rhoisy

but it asks for a password and I have forgotten it, I guess. I don't remember using a password.

Zyxel_James

please refer to these threads.

https://community.zyxel.com/en/discussion/6477/nas326-password-reset

https://community.zyxel.com/en/discussion/16280/i-forgot-my-zyxel-username-password