You hadn't actually formatted it before ?? Well, you should also know that you need to turn on the system like every 1-2 months or so, that way that capacitor gets recharged. Keep an eye out to see how long your saves last. If you finish your games within weeks, then it's OK, but know that save support won't last that long unless you turn the system on every once in a while... If the capacitor is getting bad, then the save duration time will be shorter, etc.