WD Passport is a highly unreliable portable harddisk in the market. I bought a 1TB hardisk from Croma which got corrupt after 4-months of usage. I had lost the data of around few days which I did not have back up on my desktop computer. the transfer speed is very slow.
Seagate is the ultimate reliable product in the portable market with high transfer speed. You will be assured to have retained all your data upto long time.