On your pc, right click on my computer
scroll down to disk management click
then in the lower half hopefully you see an unrecognizeable drive,(I think it shows, but w/o a drive letter)
On that drive, left side, there is a button, ( I forget what it actually says. I just did it on my pc to test, but all my drives are recognized so the button doesnt show up)I think the button is called "Active"
In there is on-line click
Now it should be recognized
Now try wbfs manager