WD  My DVR Expander 1 TB eSATA External Hard Drive Firmware updates from Tivo that need to be downloaded to Tivo boxes before they will work with our new DVR Expander Instantly add up to 120 hours of high-definition TV or up to 600 hours of standard-definition TV to your eSATA-enabled DVR Soft amber LED screen is easy to read and helps avoid annoyance at night Cool operation eSATA interface