I am currently trying to upgrade from 160gb (full drive) to a 2 TB on my HD tivo. I am using the windows based MFSCOPY and it was running overnight so about 10 hours and is still not done. Is there anything I should do or just let it keep on going? Seems like maybe something is wrong but there is not anything under last unknown error. The ETA is a bunch of random numbers that doesn't show a time or date. If I stop the program can I ruin my 160gb original?