Currently I’m using this Seagate 4 TB Expansion Hard Drive for a year so,
This is quite expensive one if you take this you need 16k-18k almost for ruling this.
It has a Capacity: 4 TB with respect to Connectivity: USB 3.0 as well as 2.0 in two ports
If you talk about the Data Transfer Speed, It can speed Up to 6GBps which is a Fantastic One I like this Hard Disk Speed more and more.
System Requirements: Above Windows 7 for Windows Users and MacOS X for Mac users and Linux. More interestingly this has Dimensions: 180 x 118 x 38 mm and its weight only 939 g. Only 939. Which is more then efficient
If your requirement is storing data and not portability then it is perfect for you.But again this on the expensive one to get.
One impotent thing is that this External Drive need A EXTERNAL POWER SOURCE to work properly.
This has a good matte finish renders the surface relatively resistant to scratches(even though none is entirely scratch proof), Which is more than Wonder full. Again an important fact that here is hardly any noise during operation and No overheating observed either.
I strongly recommend this over WD.