I use Extreme Pro cards in my cameras and phones. This purchase was 128GB A2 for the new Samsung s9+. Had to uninstall and install about 5 times for the phone to recognize it. I'm pretty sure it was phones every day. Actually installed in another phone and reformatted the card. Then he worked on the phone for which he was intended. Upon detection, I moved 1600 photos to the card and all other phone data in about 30 seconds. This card has no problem recording 4k and no problem with what the S9+ can do. I ordered a 256GB card for my S9+. I'll add this to the review after we've used it for a while.
Silicon Power Elite 64GB microSDXC 2-Pack Memory Card with Adapter for Nintendo Switch and Wyze Cam
57 Review
SmartBuy Classic Series microSDHC 32 GB Class 10, R/W 25/30 MB/s, SD adapter
41 Review
32GB High-Speed Micro SDHC Card - Class 10 UHS-I Compatible Memory Card for SD Devices
63 Review
Kingston microSDXC 64GB Class 10, V10, A1, UHS-I U1, R 100MB/s Memory Card, SD Adapter, 1 pc, Black
45 Review