When it comes to Hard disk the best company everyone will refer will be Seagate, They are the brand which gives their use more than satisfactory, Even I am owning more than 5 Seagate hardisk 2 are for xbox and 3 are for computer use, In segate hardisk the transfer rate and copying rate is higher than 3mbps, Seagate hard disk are secure and less chance are of getting damage.
They give 6 months warranty for their product and Seagate has a antivirus software that protects your files and nowadays its been coming with usb 3.0 cable that has a fastest transferring rate.
I would prefer Seagate if you are buying and external hard disk whether its for gaming console or for computer use.