64GB internal storage isn't the largest on the market but should do fine for most people. This phone is packing an octa core processor for optimal performance.
From Amazon
Sony Xperia 10 6 Inch 21:9 Full HD+ display Android 9 UK SIM-Free Smartphone with 3GB RAM and 64GB Storage - Black (Renewed)
OnBuy
Smartphone Sony Xperia 10 3GB/64GB Blue Dual SIM European Version