I just buied Seagate 1Tb portable hardsik for my laptop from a bardware store. Brandwise its very good stip hard and compact so I am very satisfied with that . It has good memory reader capacity and a good transfer speed of up to 60mb/sec even bih files like 70 80 Gb is not a big deal to transfer with this harddisk.
Service wise its also good because of quick response and availability of service centre on mearby areas, some of them may face problem because it basically works better on new gen laptops or pcs. So I would suggest if you are thinking to buy it , then its a good idea.