Seagate / Western DigitalBoth are good brands. But remember HDDs are not reliable even for a second. You copy your precious DATA today, and next day when you want to access HDD, you will see HDD is already dead. Data Recovery charges are much higher than buying 3 or 4 HDDs. So always backup your priceless data on two or more HDDs. (I am not talking about your 1080i/p collection of movies)