Understood about using a larger drive, thank you. Does that mean that I would be able to drop in a new 2TB drive without having to do anything else; it would auto-format, etc.? The Premiere XL4 is basically our "fall-back" box. It records everything our Bolt+ does. Glad we have it because our Bolt+ HDD failed the other day so I just moved the Premiere to our main HT until the Bolt's replacement arrives. The only reason I'm thinking of replacing the Premier's HDD is its age. It's been flawless since day one, but you never know. Thanks again!