I have a Roamio Plus that's about 5 years old and has been pretty rock solid. I was thinking of dropping in a 3TB drive but I've got a ton of stuff on my original drive unit that I haven't watched yet. Is it possible to swap in a new drive and use the current drive externally on the TIVO via a USB HD box for me to still access those other recordings? Or, is there a way to pull the recordings off on to my PC via a USB box? I know I could download them ahead of the drive swap, but there's a lot on it. Thoughts?