If you're fond of playing Wii, then you have to take care of your Wii CD's so that you can go back to these in the future when you want to play these games again. For you to be sure that you can still go back to these games without worrying about the CD's of Wii games, you must try copying Wii games to your hard drive.
Why is it important for you to be copying Wii games? One of the advantages of having another copy of your Wii games is for security. Since Wii makes use of discs for its games and since this is the only way that you can access the game that you want to play, then there is a possibility that you will not be able to play the game anymore if something bad happens to a CD. Most of the damages that are related to this would be the scratches on the CD which can affect the performance of the game itself. How can the CD be damaged by scratches?
Even if you always keep your Wii CD inside the case, it will still have scratches if you're always inserting it into the console and playing with it. The disc itself is quite fragile when it comes to scratches that the spinning motion of the CD inside the console can add scratches to it. Well, if you're not really that careful, even the simplest act of putting the CD into the case can add scratches to it. Worse, if you just put these CDs on any surface, then the more damages it can get. So, before you completely damaged your CD, the best thing you have to do is to create a back up.
If you were able to create a back up for your CD right away, you would not have to worry about damaging your CD. By copying Wii games, you can always play your favorite games even if the original CD was already destroyed or even if you lost it. All you need to do is to get it from your hard drive by burning a new CD of the game, and you can play the game once again like it's a new CD.