The FAQ was for the addition of an external 500GB e-sata drive, 250GB internal + 500GB external. It sounds like you are doing good with 70 hrs of HD recording. If you had added a 250GB external to your 250GB internal the FAQ says you would get 65 hrs.mike817 said:I just upgraded my TivoHD with a Samsung 500 GB hard drive and the tivo said i only have 70 hours of HD recording time? What up with that? The FAQ said i should have around 98 hours.