I am thinking of buying a hard drive or flash drive for storage reasons and also use it on the side for loading of my backups on the Wii. I know of the USB Compatibility List, but am contemplating on purchasing something not on the list, but cheaper than it would cost for a device that has the same storage amount. What factors contribute beside the sleep mode, security software protection, and overall dodginess of the parts used for the device? Most devices sold by Amazon, Ebay, and major retailers are done by popular companies that put some type of effort to sell their product, meaning they use semi-decent parts. What part of a flash drive or hard drive is the limiting factor on why it may not work on the wii? What causes a hard drive to spin down on the wii when there is obvious transfer and processing of data, or for a flash drive to not work when most use the same power supplied through a USB 2.0 port?