Hoping someone can shed some light on this as I have just been beating my head against the wall for the last few days trying to make this work. Does anyone have a single, successfully working external hard drive of greater than 3TB working with their vWii that runs both Wii and GC games? If you do, can you please share how you partitioned the drive, whether you had to do anything special with the partition table, and how you are booting USB Loader GX? I currently have a 4TB Western Digital Mybook. It is set up like so: GPT partition table Partition 1: 1.9TB FAT32 with 32k clusters - first formatted to FAT32 with Easeus partition master then formatted again to 32k clusters with Wii Backup Manager build 78. You can't specify cluster size under Easeus Partition Master. Partition 2: 1.7TB (all remaining space) formatted first to FAT32 w/32k clusters, and then to WBFS using Wii Backup Manager build 78. Used first formatting scheme in WBM (500 game limit). All homebrew apps such as USB Loader GX and Nintendont are on the FAT32 partition. All GC disc images are in the "games" folder on the FAT32 partition Wii Games are in the WBFS partition.\ Using USB port 0 (top rear port at rear of Wii U when laying flat) My Wii U/vWii is set up like this: d2x-v10-beta53-alt-vWii USB Loader GX v3.0 r1260 Nintendont v3.400 Here's the problem: No matter what I do, I can never get USB Loader GX to play nicely with Nintendont and launch gamecube games properly unless I am using a MBR on my external USB disk OR a GPT scheme with only a single FAT32 partition. Using an MBR limits the maximum "partitionable" space on the disk to 2TB and would be pointless with a 4TB disk because half of it would be completely unusable. Using a single FAT32 partition means you are limited to the maximum size that any disk utility or partitioning utility can create, which is 2TB. If anyone out there is shaking their head and saying, "No, you can make a single, continuous 3TB or 4TB FAT32 partition", please explain how it was accomplished. FAT32formatGUI can't and won't do it. Nor will Easeus. The only way that I have currently gotten the 4TB drive to work in my setup as explained above, is by placing USBLoaderGX on an SD card and launching it from Homebrew launcher that way. If I just plug my external USB drive into port 0 and open Homebrew launcher, it will not find any apps. If I hit 1 and select "USB drive" as my source in Homebrew Launcher (the only option), it will crash with a DSI Exception 50% of the time. I also have the WiiU USBLGX channel/forwarder - using this just returns me to the Wii menu after it times out. I get disk activity both ways, so it's not like it doesn't see the disk, it just doesn't seem to know how to approach the way it's partitioned. So like I said, with 2 partitions (which is the only way to maintain GC and Wii backup compatibility with the same drive), Homebrew launcher will not find any apps on partition 1, the FAT32 partition. Placing USB Loader GX on an SD card lets me launch USB Loader GX and it mounts the USB drive and both partitions just fine after starting up, but I can't launch Game Cube games from USBLGX when I try to start one. I get the error below. "To run GameCube games with Nintendont you need to set your 'Main Gamecube Path' on the first primary FAT32 partition." I have set my path to Nintendont and my main gamecube path several times. I have checked all other paths and settings to be correct. The setting stays correctly set to what I saved it as every time. It is pointing to the first primary FAT32 partition on my external. If it wasn't set to the "games" folder on my FAT32 partition, it wouldn't find the games to begin with. It clearly scans for and finds all my GC games on there so why is USBLGX throwing this error? Also to note: I can run all of my GC games just fine if I use Nintendont from the SD card and select the USB drive when it loads up. Any ideas? Anybody out there with a >3TB External working?