Can we extend archive platform using NFS?

We do not have anything like Storage Gateway in front of the ECS,

The ECS does have the ability to present NFS storage but setting this up was not in the original requirements so It has not been set up.

NFS would very much require more integration with the control panel as unlike the S3 protocol there would be no way for the user to handle permissions or modify the IPs that are able to mount the exports without having to go via support ticket.

ECS NFS mount point would not be encrypted however this has not been confirmed yet, still under testing, so the data would likely be transferred in clear text into the ECS array over the public DC5 networks