You should be able to use Midnight Commander for the job. You'll need to install it, open X Terminal, become root, and then run "mc".

Midnight Commander isn't graphical, it's a console application, but it will let navigate the file system and perform file operations with arrow and function keys. You'll get to avoid typing all those "cd", "ls", and "mv" commands at least.

EmemFM2 might also do the job. I don't know if it can be run as root as I've never used it, but it's mentioned often as a more powerful file manager.

(Actually, I've never used Midnight Commander either.)