Thats what I was going to suggest next trying different usb. Since the 1.1.2 upgrade it has been taking awhile. Did you click usb debugging? It probably did it to me about 5 times I just kept disconnecting and trying it finally worked. Sorry im not much help.
Sent from my SAMSUNG-SM-N900A using xda app-developers app
It finally worked. Next Question. What is the custom lock icon that appears on the note 3 Splash screen at the start of Boot and how do you get rid of this.