Can Not Browse to Attached USB

[snowman53]

I am using an Android TV box which has Android 6.0. It is a replacement for an older on running 4.x.

When I try to set the startup folder;

On the older system, I could browse to the /mnt/USB directory and watch videos.

On the 6.0 system, BSPlayer automatically shows the /storage/emulated/0 directory.

That's OK as a starting point, but it will not let me navigate to the /storage/USB directory.

Nor will it let me manually type in the path.

Any suggestions on how to over come this?

Thanks!