I thought that if you had an external harddrive hooked to a 722 and then moved it to a 722k it would have to be reformatted before the 722k would use it and it had to be activated again. Well I just did that and it went right over and started working. I could see and play all the shows that were recorded on the 722. Was there a update that fixed this? I am glad it worked I was ready to lose all those shows that were saved.