That's the reason I try to do it in small batches except I don't know what the ETA is before hand.
Best answer already given:
It's about 6 minutes per hour of content.
Is there anyway to stop the transfer manually assuming it's already in the background as I selected View Live TV.
Then select cancel x-fer...again, I would try to avoid this at ALL cost; again, you may end up corrupting a file(s)...either go back to the menu and select ehd and it will show time remaining or if you select the drop down from the dvr menu