I have a mac pro with the 4 HD Bays. I have hundreds of gigabytes of current work/projects spread over two of discs, not on the root disc. I propose to fit one of the bays with a two terabyte drive to back up my work. I don't mind backing up the computer(home docs apps etc.) but its not essential as I do the light weight stuff online. Is Time Machine suitable for this or is there a better simpler package that will meet my needs.