Hi, people!

Does anyone know the name of the file system a Wii U-Formatted USB uses? For example, the USB file system a Wii uses is usually WBFS.

A better question would be whether you can format a Wii U USB back to something such as FAT, without losing any of the data on the USB itself.

 

and is there any way we could open up the WFS contents on a PC?

 

It really isn't like a traditional format anyway. And WFS term was coined by homebrewers because it is referred to WFS by the SDK but only because it's actual name isn't needed when developing software for the wii u.
But basically the wii u formats the usb as a volume and treats it as a shared extension of memory just like the built in memory.
In order to read it on your pc one would have to emulate at least the filesystem on their pc and make sure the emulation was a direct clone of their personal wii u. There's more than one key encrypting the usb. And the formatting is done more like a volume than a partitioned disk.
Basically simply parsing the data with the key still won't help much.
When you poke around a bit it truely is amazing just how much actual data is stored on the usb once decompressed.