If you haven't already, I'd suggest trying Tivo support first. Even if out of warranty, many have reported getting replacement Bolts for $49. The problem you'll have now (at least as of 3 weeks ago) is that the only 2.5" 3TB drives available are from WeaKnees for $300. They do offer a $75 refund for sending in your broken drive, but you pay the shipping. You might consider downsizing to a 2TB drive or modify your Bolt to externally use a 3.5" 3Tb (or larger) drive. There are threads with further details that you can search here. Replacing the drive is not super difficult, but truthfully not as easy as some suggest. There is a helpful video on YouTube.