We got a Tivo HD about a year ago. We never watched much TV before that. Now we get to watch what we want when we want. But the Tivo can only store so much on its internal hard disk. So, I decided to upgrade the 160GB drive to 750gb. I ordered the special hard drive and found a good guide on the process here. I used WinMFS to transfer all the data around. Once I got everything hooked up, the data transfer took about 45 minutes. Now our TiVO is very happy and we don’t have to delete shows to make room for new stuff.