File Transfer with Android

[dyvandog]

Hello,
I have been using UltraVNC for many years
to connect to my home Windows PC from outside:
server installation...
port forwarding...
it works like a charm.
When i connect from outside with another Windows PC,
using UltraVNC Viewer I can manage my home PC of course,
and I can use File Transfer too:
I'd like to use File Trasfer also with an ANDROID App !!!
Is it possible ?
I tried several VNC compatible Android apps:
with all of them, I easily obtain VNC connection,
but no one of them have the built-in File Trasfer feature
(like UltraVNC Viewer for PC have).
Can you suggest an Android app that allow VNC connection
and have the File Transfer capability ?
May I have to use another generic File Trasfer Android app
to connect to my PC's UltraVNC server File Transfer capability ?
Thanks in advance,
Dyvandog