Buy the 4TB for R1799 from Makro (
https://www.makro.co.za/computing-a...ve-plus-panda-anti-virus-2015-1-user-255120EA)
Open the casing and use the drive as an internal. It is a ST4000DM000, same as you would buy when you buy the 4TB bare drive.
I even re-used the casing to put an older 500 GB drive inside.
People must not say Seagate fails more, I have had many WD and Seagates since I had my first pc in 1987 and have had failures on WD and Seagate, sometimes you might just get a bad drive, its the luck of the draw.
Edit:
Interesting thing if you check the warranty of the bare drive that you took out at
http://support.seagate.com/customer/en-US/warranty_validation.jsp
it says it has a 3 year warranty whereas bare drive bought separately only has 2 year