I'm using an external iomega mini max drive. I replaced the 1TB drive with a 3TB Seagate. It will not see the full 3TB drive it will only see 1.5TB. I did partition the drive and format with GUID and Journaled. According to thishttp://knowledge.seagate.com/articles/en_US/FAQ/218579en it should work but I cannot get it. Running Snow Leopard Any help is greatly appreciated.