Review on 📷 KOOTION 64GB Micro SD Card: High-Speed Class 10 TF Card for Smartphone/Bluetooth Speaker/Drone/Camera/PC/VR by Jeremy Gulledge

I was skeptical about the nameless brand but seeing the good reviews I decided to give it a try. I used them on a Raspberry Pi 3 and they were a total disappointment. I started by flashing the OS I wanted onto it with Etcher. Each of them failed the checksums on the first pass. Most of them were successful on the second try. Once in the Pi, the OS booted fine, but I could tell they didn't run to the full Class 10 standard (at least they didn't live up to big brand expectations). After about the 3rd or 4th OS write through Etcher, the cards rarely had the correct checksum, and even when they did, Raspbian didn't get past the rainbow box when first powered on. Needless to say I sent them back, got the name tag and haven't looked back. All the money I saved for her was wasted.