TiVo Premiere Elite / XL4 Series4 – TCD758250
It is the first unit to have an HD interface, although not all parts are fully HD.
Upgraded 3TB Lifetime Tivo Premiere OTA and/or Cable TCD746320 new drive
When I received this Tivo it wasn't working right, the original 320GB hard drive had failed. I have removed it, and replaced it with a 3TB Western Digital Purple drive (model WD30PURX). I was able to put the correct system image on that drive so the Tivo can use it.
Upgraded 2TB Lifetime Tivo Premiere OTA and/or Cable TCD746500 with remote
When I received this Tivo it was working fine, still had the original 500GB drive in it. I have removed it, and replaced it with a 2TB Seagate Video 3.5 hard drive (Model ST2000VM003). I was able to put the correct system image on that drive so the Tivo can use it.