These cards are good for photography but they are NOT good for recording 4k video at 30fps or 24fps. Get SanDisk Extreme cards instead if you want to shoot in 4k. (Look for a 3/10 rating; these Lexar cards are rated 1/10).
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
π½ 512GB Samsung Evo Plus Micro SDXC Memory Card
40 Review