I have a pair of 3TB Bolt+ units (long story). One is in normal use and one is emergency spare. The main unit failed and I will be ordering an external 3TB Tivo-formatted drive from Weakknees. I want that unit to return to being the primary unit so that the stupid 2.5" HDD in the backup unit...

I have a 3T Roamio Pro and a Premiere (2-tuner type). The Premiere has a 500GB internal drive and a 1T external drive. What is the fastest way to transfer the TV programs from the Premiere to the Roamio? I'd like to retire the Premiere, but it has lots of programs I'd like to keep (football...