my toshiba external hard drive keeps coming up as local disk, everytime i click on it or right click it freezes my laptop! i have tried to go into disk management and moving the drive to another letter but it freezes and stay's on "connecting to virtual disk services" and when i go into task manager to end the task my computer freezes again and goes black screen. what can i do please, it's a 2TB hard drive and i cannot afford to loose everything on it.