I've already tried it, have moved / deleted all but a few and there are two of the three left that will not show as available to transfer no matter what. As a test I tried deleting one of them thinking I would restore it from the Deleted folder and then see if I could transfer it - the joke's on me - it doesn't even show up in the Deleted folder to be restored even though a bunch of other stuff I deleted does appear in that folder. The EHD function worked so well in the 622, how did they screw it up so badly in the Hopper???
Try using "Select All". You can try it even if nothing shows up on the transfer list (honestly I don't know if it works in that situation, see below).
I just ran into the same issue when upgrading my hoppers to w/ sling last weekend. "24: Live Another Day", and I think other shows, never showed on the transfer list. Since I was transferring everything to the new box, I just used Select All. It ended up transferring everything, except for the last episode of 24. I tried everything under the sun to get the episode transferred, but nothing worked. It never showed in the transfer list and the Select All "trick" didn't work either, with or without recordings in in the transfer list.
EHD with the Hopper is definitely buggy. I'm currently in the process of transferring my other hopper and I am crossing my fingers.
Edited by bbohl, 20 June 2014 - 02:15 PM.