I just finished doing the same thing with my networking equipment. I have a different make and model than yours but from a quick scan of the documentation for yours reveals it uses samba like mine, (smb). (And probably most others are the same as well).
Here's how I access mine:
Find out the IP address of your networking device (server)
In the 'Places Menu', find 'Connect to Server'.
You should be presented with a 'Connect to Server' dialog box,
(a) change the spinbox in the 'Type' field from 'Public FTP' to 'Windows Share'
(b) enter the IP address for your server in the 'Server:' field
(c) (optional) - Tick 'add bookmark', and enter any name you like for the new bookmark
(d) click 'Connect'
A User on Stack Exchange pointed out 192.168.0.14 was my laptop address, not the EX6200 address like I thought.
I found the address for the EX6200 by logging on to my router and looking at the Device table. That coupled with @Herman’s reply in post #3 solved the problem.