Robot Backup to a Remote PC

Dear Team,
We have one upcoming project in Dec 2021.
In that customer requirement whenever customer presses Backup button the robot backup should go to one folder in Line PC and that line PC has 10 robots connected Via WAN port.

In robot we have
FTP NFS option as well as PC Interface option both.

If someone can help me on this that would be great.
Br/Sujoy

In the link below there is a portion that deals with IRC5s and FileZilla Server.

https://forums.robotstudio.com/discussion/11005/how-to-connect-to-abb-irc5-via-ftp-and-upload-prog-mod

There is another forum where a very similar IRC5—ftp backup series is current, perhaps investigation there may be of some benefit??