Got a question for y'all for my brother. He currently has a 722k system and is moving and will have a 1 hopper 2 Joey system installed at the new house. He is wanting to know what would be the best external hard drive to use to move the recordings from the 722k to his new hopper system. The 722k and the hopper will not be hooked up at the same time so any advice would be great. What we would really like is a hard drive model that has been proven to work from 722k to hopper.