There are about 3 different things being discussed here: The 2 TB limit is kernel limited and while it could be updated, probably without any real issues, however DIRECTV has no reason to do so as they aren't putting HD's that large in machines. Being able to archive a drive to save recordings when replacing a receiver. This could be possible depending on the failure of the unit if they added the function to make an image creator and loader into the OS. However this would require supporting external HDs officially. Archiving programs for personal use which at this stage in the game isn't even on anyones radar. For every reason you want to do it the companies have not to do it. The bottom line is because it would negatively impact the bottom line.