I bought 5 no brand micro SD memory cards from 5 different sellers. All of them are fake.
3 of them are 32GB and 2 of them are 16GB
What I did are as follows:
1. Copy data to the micro SD until it is full.
2. Compare the data on the micro SD against the original data on the hard disk.
On Windows Explorer, the capacity and the directory of the micro SD look good. But the comparison results show most of the data are different. The data saved on the micro SD is either messed up or copied to nowhere.
Be careful. Good luck!