ssd/sshd

I want to buy 2 TB very fast Portable/External SSD/SSHD and very fast HDD. Price is no concern for both of these SSD and HDD, but speed should very fast write and read speed. 2TB SSD/SSHD suggest fastest ssd 2TB HDD - USB 3.0 will be fast or something else? suggest fastest hdd. PS. - Price is...