Portable drive for photos

Im looking to buy two portable drives for storing photos on, one will be a mirror copy of the other looking at least 4TB each so what would you guys recommend?

Hi,

You could refer to the following link: https://shop.westerndigital.com/products/portable-drives/wd-elements-portable-usb-3-0-hdd#WDBU6Y0040BBK-WESN