Your Wii has a 6-layer motherboard. I've also had some issues with RVLoader running on USB drives on my 6 layer Wii. Unfortunately I haven't done any formal testing, but the few drives I've tested have lined up with the page named "USB Devices Compatibility List" on the site wiki.gbatemp.net. I currently have a 64GB USB 2.0 SanDisk Cruzer Fit (SDCZ33-064G-G35) in my 6-layer Wii with RVLoader. It's fairly stable as long as you don't do a lot of write like ripping a disk. The 32GB Cruzer Fit should also run fine. If you need to be able to rip disks, I've gotten the 16GB SanDisk Cruzer Switch to rip files, but can't find anywhere you could buy one. If you need to discuss further, it might be better to create a new thread, please.