I'm hoping someone can help me here because I'm not getting any help from Seagate's website or anywhere else I search online. I just bought a 4 TB Seagate drive and when plugged into my Mac it's only being read as having a 1.8 TB capacity I know my computer can see larger drives because I've had 3 TB drives plugged in before that worked fine. I have reformatting the drive in every format imaginable, even doing so from Disk Utility when booting up the computer, but nothing works. :-/ Can anyone give any advise on what might help? As a final bit of info, the drive will ultimately be placed in my Drobo as part of a Beyond Raid setup, but I want to test the drive first to make sure there aren't any issues. When I first inserted it in the Drobo it read as 4 TB but then got interrupted during the setup and I took it out to run further tests. I suppose it's possible the drive itself is bad? Just don't want to send it back unless I'm sure. Thanks!