Xbox Custom Boot Screen For Xbox One, Series S/X

Microsoft haven't said it is. I believe the green Xbox One startup screen will stay, and the Xbox Series X/S will get the new Xbox boot up screen.

This article explains the difference between using a regular external hard drive versus the custom external storage for the Series S/X- https://news.xbox.com/en-us/2020/09...xbox-series-s-custom-storage-solution-primer/

An external hard drive used on the One will work for the Series S/X, but won't have the exact same performance as the one created for the Series S/X.

No such thing as an Xbox One Series X. The Xbox One family of consoles has an S and an X but are still just Xbox Ones. You need the Series family of consoles. The Xbox Series S or Xbox Series X. These are different from Xbox One S or Xbox One X.

The "One" and "Series" are the console types.

Hi there.

Thank you for reaching out to the forum. Unfortunately not. All Series S/X and Xbox One Games with Smart Delivery, thoughs have to run from the internal storage or expansion slot drive. But for Original Xbox, X360 and
Xone game without enhancement, they should still run fine from your external unit.

More information here:

• A Primer on the Simple and Custom Storage Options Available for Xbox
  Series X and Xbox Series S at Launch.

Hi,

On an Xbox One, Xbox One X and Xbox S, yes.

On an Xbox Series X or Series S, no.