Setting up a SAMBA or NFS server on Android

Does anybody know how to get Volumio to see one?

I’ve tried Samba Filesharing https://play.google.com/store/apps/details?id=com.funkyfresh.samba, Sambadroid https://play.google.com/store/apps/details?id=berserker.android.apps.sambadroid and Servers Ultimate https://play.google.com/store/apps/details?id=com.icecoldapps.serversultimate to no avail.

The Samba servers could be seen by Windows, but not by Volumio. The NFS server I tried to set up with Servers Ultimate wouldn’t be found by Volumio either.

I am rooted.