Buy it on: Amazon
This is your basic starting point for adding extra storage space to your Xbox One X, and keeping you from deleting old games to make room for new ones. And while there are plenty of manufacturers out there with competing 1TB versions in different sizes, what's appealing about this particular line is that there's no external power required, and they come in cool colors.
If that striking orange isn't your thing and doesn't match your decor, go ahead and pick dark red, blue, white, or the standard black to match the Xbox One X.
These are also super affordable. They aren't much more expensive than your typical thumb drive but offer vastly increased storage capacity, effectively doubling the size of your Xbox One X storage space immediately. For less than $60, it's a worthwhile investment.