Are forum-goers interested in keeping an informal database of tested-compatible USB storage devices for the Wii U? The official list is rather anemic at the moment. Given that the majority of USB storage devices work properly with the Wii U, I would imagine that a list of the incompatible ones would be most useful. Regardless, I propose that we make a list of what works and what doesn't, and try to maintain it for our benefit.
Please be as specific as possible when including device information. Model numbers are extremely helpful! I will try to keep the first post updated.
Compatible external storage:
Iomega LPHD-UPC
Incompatible external storage:
Vantec NST-210S2