Yes, it is true. However one copy of the game is only 60 GB, resulting in a total of around 120 GB, nowhere near as much as the 200+ GB you mentioned. If you have a 500 GB hard drive and don't have an excessive amount of files or games that you don't use, you should be okay. The thing is you want to keep only the things you need, things you will or likely will need soon, and the things you actually want and use on your computer. Before you install LSPDFR, copy the whole of the original game files over to another file, and make only a shortcut for the one you want to keep clean, then make a shortcut later to Rage when you want to use the modded one. But don't copy over, it'll take an hour every time. Best waste a single hour on making two copies.