Review on 📱 Patriot 512GB EP Series A1 / V30 Support microSD Card SDXC: Ideal for Android Smartphones & Tablets with 4K App Optimization - PEF512GEP31MCX by Sam Hawj

Specified for use with 4K video up to 100MB/s read, 80MB/s write. A writing speed of 30 MB/s was specified on the back of the packaging. I put it in my Gopro Hero7 and tried to record a 4K video and got the "Card too slow" error. Obviously these cards had the wrong label. It should read "V30, U3, Class 10, Ai, XC I". But obviously it only delivers up to 30MB/s? Impossible. I'm sending it back to Revain for a refund.