Very bad product. Initially, it was very slow, but I wish that was the only problem. I transferred files from my phone to this card, and even though it seemed to have the full capacity, the file was corrupted when I opened it. Unfortunately, it falsely indicates more memory than it actually has, and when you write more than its natural limit, it writes them but in a corrupted way. It's a common practice among the Chinese, as I am a frequent customer of China and they do such things, so you have to be suspicious. Unfortunately, I didn't know this beforehand to test it like I do with products from China.

With difficulty, registration at 10 Mbps and reading at 15...
And I'm referring to large files and a USB 3 card reader, where it should have at least triple the speeds. Stay away from this card, it's a big hassle