For everyone external hdd has become a needy gadget now a days. even I had bought a seagate 1tb for 4500 bucks from ebay. speaking about this hdd its very fast like a lighting speed. make sure that your laptop or pc has an 3.0 usb connection and connect this hard disk and try to transfer a big file, it transfers at a speed around 90 mbps. which is 5 times better than 2.0 usb version. this hdd doesn’t need a power supply simply connect and use.
it comes with 5 year warranty for which you need to resister on their website with its serial number. though I dont have much knowledge on other brands like westren digital, toshiba etc iam very much satisfied with this product and finally remember that for 1tb you are going to get only 965 gb of data usage.