连接到PC的Go访问智能手机

I'm trying to copy files from a pc to a smartphone. The problem is, that Windows doesn't assign the phone a drive-letter. It just shows up as 'Phone' (the device name).

The path shown in the Explorer is 'This PC\Phone\SD card,' which is not a path that a go programm can use.

Is there a way to directly copy the files or do I have to use ADB?