I have a VIP612 and just replaced a failing 750GB Western Digital EHD with a 1T Seagate GoFlex Ultra-Portable drive. I'm off to a shaky start... The drive was recognized and formatted, but it showed only about 500GB available. What??? I transferred a couple recordings to it without a problem. I power cycled the 612 once to see if that would fix the capacity reported - no change. I also unplugged the 612 once, but still no change. At one point, a warning displayed which referred to an unsupported device. I'm hesitant to continue adding more recordings to the EHD for fear of ultimately losing them. Any advise or insight?