Review on 💾 KOOTION 128GB Micro SD Card Class 10 Memory Card - Ultra High Speed TF Card, C10, U1, 128 GB by Josh Koa

I was skeptical about the nameless brand but based on 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 turned on. Needless to say I sent them back, learned the brand name and didn't look back. All the money I saved for her was wasted.