I've noticed that a FEW games simply do not work on external hard drives but do on flash drives. I've tried multiple settings just to see if anything would change but some games simply do not play. For my flash drive, I've been using a Sandisk Cruzer 16gb flawlessly without ever having a problem. For my externals, I've tried MULTIPLE hdds and they all have the same black screen. The externals I've tried out are Hitachi 320gb Toshiba 320gb Seagate 500gb and some others I forget. A few examples of games that do not work are Castle of Shikigami 3 Shiren the Wanderer Monster Hunter Tri (the game plays but do not load animation screens properly and freezes) Note that this problem only occurred in externals. I've also experimented with multiple wiis as well and the same problem occurs.