I am in the process of cloning the 2TB drive for my Tivo Premiere XL4 (model 758250). This would be just to have a backup drive in case the original drive fails. I only have about 4-5 hours of programs on the original drive, nothing critically important. My question is this - will it reduce the drive cloning time if I have "permanenetly deleted" all "deleted" programs on my Tivo? Or will it have to "copy" the full 2TB drive? The reason I ask is that on my first attempt I used a 1TB drive as the back-up, and found out that the back-up failed since the drive to be cloned has to be equal or larger in size than the original source drive. The copy process for the first TB of copying took almost 5 hours. I have now purchased a 2TB drive and plan to run the clone this week - but am afraid it might take 10-12 hours. (note - for copying, both sata drives are hooked directly to mother board on Windows system).