2-pack contained one 128GB 1800x V60 U3 card as ordered, but the second card was 128GB 2000x V90 U1 card. I am concerned that the V90 U1 card will not be sufficient when shooting 4K video.

I bought this card because it was advertised as V60, with super fast read and write speeds. But in reality, it does not deliver what it promises. When I used it in my camera to record slow motion (only 60 fps), I immediately got an error message saying I needed a faster card than V30. That makes no sense, since a true V60 card should easily handle this. This proves the card does not meet the advertised specification. It feels like they just slapped a V60 label on it, but inside it's a much lower–performance card. If you need reliability for professional video recording, especially with cameras that demand real write speed, stay away from this product. It's risky, doesn't perform as promised, and is basically a scam.