Getting Recordings Off DirecTV DVR

Hello All

I have some television appearances I made stored on an HR44 DVR that I would like to transfer off the DVR before I finally kill their service. I am planning on using a Roamio Pro with a cable card in its place. I know the Roamio won't interface with the DTV but, could I buy a series 2 and move the programming onto it or its external drive and then move the drive over to the new Roamio?

Thanks in advance!