I am Vikram(India) and I'm planning to buy a 4TB external hard disk and I have no idea whether to go for 'Seagate' or 'Western Digital'. I'll just use it for storing my movies, pictures etc., and nothing else. My primary concern is the life time of the HDD. I just want a hard drive that just lasts long and won't fail on me. So, please help me choose between the two drives.