I played several of mine just before switching and they played normally. I also transferred a few to the EHD in the switch and several of those will no longer play. Prior to switching I never had any recording on an EHD that wouldn't play. Ever. And I had 3 722s, all connected with EHDs. On multiple hoppers I have the same issue now, so it's not an issue with a single hopper or a single EHD. Hope that helps.