My last laptop suddenly gave out, so I've extracted the harddrive & I am trying to move its files over to my new laptop. I've got got a SATA USB adapter to help with this.

My struggle: I've put password protection on the old laptop (now an external drive) and its not obvious how to authenticate into it.

No, I can't swap the harddrive since the new laptop's entirely solid-state. Yes, I know the password.

I'm on elementary OS.