Okay, so I've looked around GBATemp and done about 2 dozen online searches and found that if you use a drive formated by the Wii U it won't work for USB loaders in Wii Mode. However, I've not found any information for a few questions I have. 1) If I'm using a large drive, i.e.: 2-4 TB, and have formatted only half of it to be WBFS for USB loaders to run Wii Backups does the Wii U see the unallocated space as a different drive? 2) If the answer to the above is, "No," then is it possible to resize a drive partition created by the Wii U, and then format the newly unallocated space as WBFS for USB loaders? 3) Assuming the answer to either of the above is, "Yes," then will the separate partitions work in their respective environments, the Wii U partition for Wii U backups and the WBFS partition for Wii/Gamecube backups in Wii Mode?