Hello,
Try resetting the unit following the steps from the llink below.
http://wdc.custhelp.com/app/answers/detail/a_id/5679/related/1/session/L2F2LzMvc25vLzEvdGltZS8xMzgyOTk2MjA1L3NpZC91SVNQcFlEbA%3D%3D