Xbox not updating from usb
If you don't hear the two power-up tones after 10 seconds, then the update has failed.
If you do, the update has been successful, and the Xbox One will now restart (which may take several minutes, Microsoft warns).
UPDATE: Microsoft has removed its instructions for updating Xbox One without connecting it to the internet.
Given that the system isn't out yet and players can't check for their OS version, those looking to get a head start on the process will need to account for that missing nugget of information.
After setting up their USB stick, the next step is to power off and unplug your Xbox One, plug the power cord back in after 30 seconds then hold the bind and eject buttons while turning the system on.
The method isn't simple, but it is possible - and Microsoft's Xbox Support website has revealed a 20-step guide to the process.
First, you'll need to find out which operating system number your Xbox One is currently running.