Review on 256GB Micro SD Card Class 10 with Free SD Card Adapter for Nintendo-Switch Android Smartphones, Tablets, and More by Jose Guevara

I bought this microSD card for my smartphone. It worked fine for a day, then I got notifications that it was too slow, then the apps using it stopped working and I had to uninstall, reformat and restart. Several such cycles and I had to factory reset the phone. However, as a storage device that doesn't require constant demand, it works well, so it's been classified as long-term archival. A bit disappointing but still worth the price.