I have been using a WD 1TB DVR expander with a TiVo Premier for the past 14 months. All of a sudden TiVo is not recognizing it. There had been no changes in the setup. I have now reset the TiVo twice and then tried to run the SMART tests, but even then the drive wasn't recognized. I have reset the TiVo w/o the drive for now, but really want to fix this problem. Any suggestions would be greatly appreciated. Thank you!