NFS is inherently insecure. It would be a very poor choice for connecting over the internet. I like the post that mentions rsync. Instead of using cron to fire the transfer, I would hope that you could simply run the rsync job from your code that handles the file upload.

What is NFS? - lynda.com - [Instructor] NFS, or Network File System,…is a protocol for providing access to files over a network.…NFS was developed by Sun Microsystems…and is popular for shared storage…for hosting user home folders…in a multi-user network environment…and is supported by all major operating systems.…But unlike with other protocols, access to NFS shares,…or exports, is granted to hosts Dune HD TV 102 Internet media streamer for IPTV, online tv Can be used for various IPTV services streaming. IPTV: Playback and record IPTV streams. Network Player: Connect Dune HD player to a local network and play content directly from PC or NAS via UPnP, SMB, or NFS. Need for Speed™ No Limits - Apps on Google Play Jun 08, 2020

Network File System Version 4 (nfsv4) - Documents

NFS over CIPE-VPN tunnels - Linux.com May 23, 2005 Configure NFS Server and NFS Client Raspberry Pi May 22, 2020

NFS over the Internet? Category: Linux — Published by tengo on February 27, 2009 at 4:28 am. I recently had the idea of trying to use a NFS (Network File System) share over the network and did a bit of research about it. Here are my results: As became obvious, the idea is not that new,

Jan 05, 2015 Network File System - Wikipedia