I have modded aprox 50 Wii's for friends/family members and out of all of them only one has given me this problem. I've used the "Modify any Wii 4.2 & below" method to mod every one of the Wii's I have done, I do them all the same from the DarkWii Theme, WiiFlow USB Loader, Starpatch 4.2, ect. I only recommend two different hard drives when I do a Wii, the a Seagate Free Agent or a Western Digital My Book. At first I thought the Seagate drive was bad so we returned it and got another drive and its doing the same thing. The Wii loads WiiFlow, runs game after game after game, you power it off and then the next time you turn it on it does not recognize the hard drive. To get it to work again you must power it off , unplug the power to the harddrive and plug it back in, then turn the Wii back on and everything works again until the next power cycle. Any ideas why this is happening?