Instead of copying files to-from the cluster using the terminal, install a GUI called FileZilla that will let you simply drag and drop them. Here is what it looks like:
Detailed instructions on how to use FileZilla to move files between your computer and DCC.
You can also make folders, delete files, etc. by right-clicking.
When you select a folder it might take FileZilla a second to show you the contents.
You can browse your local disk in the left half of the window but it is much easier to use Finder instead.