I think my Roamio's HD expanded itself from 3TB to 4TB. Odd, right? Let's recap. I gleefully bought a Roamio Plus and two Minis to replace my awful old STBs. It ran fine for a couple years, then its main drive died. My wife wanted me to keep all her programs intact if possible. I tried to copy the programs to another drive using mfstools and other arcane arts. Either through the obtuseness of the operator or programs, or perhaps the drive itself in a state of obsequiousness refusing to cooperate, I was unable to perform this operation after several days. As I said, the drive was clearly in a state of failure in its host TiVo. As a last ditch effort to get a backup of my wife's precious recorded programs, I popped the drive in the freezer, allowed it to warm up without condensation, and as soon as it was warm enough to not condense, I dd'ed the contents to another drive. This worked! Of course, the only drives I had on hand were 4TB. The original drive I had in the TiVo was the 3TB "at the time size limit without arcane voodoo" I popped in there when first installed. Yes, the cäblêçaRd wasn't happy about my UUID change with a different hard drive. One call to Verizon fixed that. We've been running ever since, with me knowing that there sits 1TB of free space lying in wait for someone or something to tell the Roamio of its existence. I stared at the 100% full indicator in indifferent silence. My wife was happy, so was I. Imagine my surprise to see that 66% full indicator that happy day! I've visited the System Information pane; it seems oblivious to the change, showing the old 3TB 476 HD hours. I'm sure there's new space out of nowhere. I don't really want to pop the drive out to examine the partition map in detail, so I won't. Has anyone information about why/how this expansion suddenly happened? I'm running Hydra. It's been great for a couple revs now, though it was rough getting here.