256 GB internal storage isn't the largest on the market but should do fine for most people. With a 3 GHz octa core processor, you get a lot of hardware for your money.
From Amazon
ONEPLUS 10 Pro 5G 12GB RAM 256GB SIM Free Smartphone with Hasselblad Camera for 2nd Generation Smartphones - 2 Year Warranty - Volcanic Black
Clove Technology
OnePlus 10 Pro 5G - UK Model - Dual SIM - Emerald Forest - 256 GB - 12 GB RAM - Excellent Condition - Unlocked
OnBuy
(Black) OnePlus 10 Pro Dual SIM | 256GB | 12GB RAM