Best SD card for 4K video recording on cameras?

[StringTheory51]

I am getting into 4K video and keep seeing dropped frames warnings. I assume my SD card is not fast enough. What cards are actually reliable for sustained 4K recording? I have been looking at SanDisk Extreme PRO 128GB SDXC UHS-I Card and Samsung EVO Select 128GB microSD Card but not sure if they are enough.

[Quanta]

SanDisk Extreme Pro is the safe choice for 4K video I use it in my camera with no issues.

[SuperPosition]

Samsung EVO is good but for video I would still lean SanDisk for consistent write speeds.

[Teal Sparrow]

Make sure your camera supports the speed class otherwise you are wasting money on faster cards.

[HiggsField29]

I had dropped frames on a cheaper card and it disappeared after switching to Extreme Pro.