I have used many hard disks because I need data more than anybody else and wd proves to be the best for me .
The main thing which a hard disk should possess is its speed, when you are transfering from usb 3.0 it gives 28 MBps speed continuously and for a 1 gb movie it usually take about 25-30 seconds or less as when starting your transfer it usually goes upto 150 MBps .