I bought a Seagate 3 Tb drive to facilitate the transfer of my programs to a H3 scheduled to be installed tomorrow afternoon. I plugged it in yesterday afternoon. I re-plugged it into the other USB port last evening about 6 PM thinking there must be a problem. My thinking now is that it is going okay but it's just a very long process. The scheduled reboot occurred last night. I assume the process would have started over then. It's been about 10 hours since and it still is humming away but not yet visible as an external drive. Have any of you had a similar experience? How long did the reformat take on your 3Tb?