Hi
Ok, so how about running a Virtual Machine? Perhaps acquire an old hard-drive that you don't care about too much and physically unplug all your 5Tb and then plug in the experimental one.
Btw on a command-line if 2 pathnames or file-names are quite close to each other then when you press Tab it will show the 2 or more options and then give you a new prompt with all the stuff you had already typed already on it. Sounds complicated but try it and you'll soon work it out.
Regards from
Tom