I just got a new WD 1TB expander. Not trying to do any of the fancy things I see here, just want the DVR to work with it. Series 3HD: Connect the drive, the system sees it, asks if I want to set it up. Go through set up, wait through the restart (can we nuke that dog?), and 5 minutes later, system sees it, asks if I want to set it up, etc. etc. The very definition of an endless loop. So went through the short version of the SMART drive test, both drives pass. Get onto Chat with Tech Support. The answer: Yeah we've heard there are issues with the 1TB. You should have gotten the 500. Mention that THEY sell them and imply they work on the TiVo website. Answer: Yes we do. Better contact WD. Yeah, lots of help. WD, who, of course has customer service hours that are long past PDT and zilch to help on their website. So, I have faith that one of you great techies out there might have an idea that doesn't involve violence. Please help! Thanks for listening.