Anyone know of a decent 4K write speed on a 64GB USB 3 thumb drive?

[jdmba]

Greets - Tons of reviews out there show strengths and weaknesses of USB 3.0 Flash Drives but they all seem to have awful 4K write speeds, and there is no way to compare 4K write speeds across all flash drives. Anyone out there in forum-land know of a 64GB USB 3.0 Flash Drive (not SSD) which has the comparative best 4K write speeds? THANKS!