whats the best micro SD for the S7 for shooting video 4k?

[AC Question]

I am looking to buy a micro SD card for my Samsung S7 and I primarily use my phone to shoot 4k video. I will need alot of space (either 128 or 200 GB) and I think more importantly I want to make sure I maximize the transfer speed and the quality of the file kept on the Micro SD card. Suggestions welcome. I am not sure what specifications fit best with the S7 itself.