The write speed is very bad.
It takes hours to fill the key (32GB)
Moreover, this is the first time I see it on a key, the write speed is not constant.
Transfer is 4.5MB / s for 2 seconds and nothing for 1 second.
In short, this key does not give me confidence despite the famous mark. I will keep to tinker but not for storing valuable files.
It is a pity!