I have a TS5400R and the root/HTML has become corrupted or unusable. I can't manage it in any way. file shares are still available. however, there is a notice on the unit that there is a firmware update for this unit. I need to reset this back to factory defaults.. don't care about the files on the drives as I've backed them up elsewhere. since I can't access the OS or HTML root page, how do I reset this back to factory defaults? I've powered up the unit with the reset button pressed, but the system still comes up using the same static iP I've set. It doesn't seem to reset anything.