Hi,
Once you connect to app3.0 with laptop, below BST board should be searched in device manager.
If not, you need to download USB driver.
Also, you can upgrade app3.0 firmware as below path.
C:\COINES\v2.7.0\firmware\app3.0\update_dd_fw.bat
After upgrade, please reset app3.0 and try it again.
Thank you.
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