The only real way to increase the storage of an Xbox Series X/S is to use a specialized expansion card. Luckily, a really good one is heavily discounted right now. The WD 1TB C40 storage card is down ...

a storage expansion card can help, and right now you can score a great deal on the WD Black C50 1TB storage card at Amazon. The Big Spring Sale might be over, but the deals aren't entirely done yet.