1. Read micro SD Card by Card reader and MUST FORMAT it on computer.
2. Download and open the TF-test.zip (It is Compressed file in zip format, extract the file named "TF-test.exe" from the zip.)
3. Clink "Select target",to choose the SD CARD you want to testing
![](http://www.toguard.cc/uploads/allimg/180818/1-1PQQ22916408.png)
![](https://cdn.shopifycdn.net/s/files/1/0406/3048/5147/files/1_abe65558-ebf0-4992-b192-813561d315d2.png?v=1593765783)
4. Choose " Write + Verify " to show the final test screen.
![](http://www.toguard.cc/uploads/allimg/180818/1-1PQQ2444J23.png)
![](https://cdn.shopifycdn.net/s/files/1/0406/3048/5147/files/2.png?v=1593765861)
5. It will take about 20-40 minutes to finished test, after finished, please send me screenshot of below to show the date of the SD Card
![](http://www.toguard.cc/uploads/allimg/180818/1-1PQQ245432O.png)
![](https://cdn.shopifycdn.net/s/files/1/0406/3048/5147/files/3.png?v=1593765879)