This micro to USB Cable has three ports, one is to connect TV Stick, one is to connect power supply, and the other is to connect external USB devices. So, when you have these two products, you just need to connect and use them.
The specific connection is as follow.
Ater conntected, pls download File Explorer App on your TV Stick.
Once downloaded and installed, just open it and find the files you need to use.
For example, I need to install an APK file. I just need to find this APK file, install it, and use it.
That’s all. If still not clear, please learn more through the following video, or email at firstname.lastname@example.org.