The only way to see the files remotely is via an app installed on the travelling device, which I presume the download page for which is what you’re being directed to (I can’t see the picture you’ve posted, as it hasn’t been approved yet).
It’s not possible to view the files in something like Windows Explorer when remotely connected, you can only do that via mapped drives or an SMB/NFS view when you are on the same local network as the MCM. The page you link to above is for the MyCloud - remote explorer access isn’t possible on the MCM.
Such full remote access has been requested several times for the various products, such as the feature ideas here, hereor here (and there are probably many others in the ideas section).
