I have a shield TV and a 1tb usb3 hdd attached, its not mounted as adoptable storage as i unplug it and take it to my parents and friends places, and its only for videos anyway.

Id like to be able to share it from the shield as a smb share so i can dump files onto it from the wifi, but i think the built in smb sharing is only for internal / adopted storage.

Is there any apk i could sideload that will happily run in the background, or do i need to be looking into root options?