Review on Amplim Extreme High Speed 512GB Micro SD Card - MicroSDXC U3 Class 10 V30 📸 UHS-I TF with Adapter: Ideal for Nintendo Switch, GoPro Hero, Surface, Galaxy Phone, Camera Security, Tablet by Daniel Mandal

Something didn't work right from the start. Read/write speeds weren't as good as the specs said, but they were close. I noticed that the more I used the card, the slower it got on both reading and writing. Finally after 2 months it just stopped working and I lost data on it. I reformatted it and it stopped working after 12 minutes of video recording. I'm afraid to use it in anything critical. I'll update this review if anything changes for the better, including a warranty replacement if there's a lot of it.