I've used f3 (fight flash fraud) on every SD card I've bought for myself or someone else. Never had a failure, but I've pretty much only bought cards direct fro

I've used f3 (fight flash fraud) on every SD card I've bought for myself or someone else. Never had a failure, but I've pretty much only bought cards direct from mixza on aliexpress. I'd certainly recommend testing any flash device you get, especially cheap ones. It might take eight hours to write and verify, but it's well worth it. (if you can abide disputes/returns) https://github.com/AltraMayor/f3 https://github.com/AltraMayor/f3