Gnome is the GUI so yes, I just used the standard Gnome desktop. The latest version of Ubuntu uses Nautilus as it's file manager. You just get root access (they turned it off but not hard to turn it back on), find the 2 partitions you want to copy from and to and just drag and drop. It copies all the attributes. The biggest trick is to get SU Root access as the Hopper sets the owner of the EHD as 'root'.
SU into root, launch Nautilus and drag and drop. With the wonky naming conventions, it helps to keep a notepad around as they use random characters for the partition names. It's pretty easy to figure out which is the smallest EHD to the largest as the smallest will have an sda1-~3 partitions while the larger one will have 13 partitions. And start with sdbx,. But once you open the partition you loose which partition you opened and just see the DishArc folder and the random partition name. So you need to keep track of which one is the source and target as both windows will just say 500GB Volume. But when you start, it's rather simple. The one that's empty is obviously your target and the one with lots of files is your source. It's if you want to either add another file or copy less than one for one that it gets tricky.
I had a very old EHD from my 722 that had 512GB partitions, so everything wouldn't fit into the new 500GB partition structure, so I had to select enough to fit in the target and then switch to a new empty one to copy over the rest. The other EHD's were formatted under the H3 followed the convention.
