Dedicated External HDD For Weekly Backups

My personal desktop computer specs:
-i5 4460 3.20GHz
-MSI GTX 970 4GB
-Corsair Vengeance DDR3 1600Mhz 2x4GB Dual Channel 8GB kit
-1920x1080 LG monitor
-EVGA G2 550w Gold Modular PSU
-Samsung EVO 850 250GB SSD
-1TB WCD Hard drive
-ASRock Z97 Anniversary Motherboard (Socket 1150)
-Windows 7 Home Premium

Hi Community

So I have a pretty powerful setup which I would like to keep safe from harm and I have recently put an SSD in for the OS which took a very long time to setup OS and driver wise. So after I had done that I created an image file on my Fathers external HDD though he'd rather I hadn't had to so asked if I could get my own backup drive in the future. Then I burned a windows recovery disc as well via control panel.

I have recently got a monthly contract with a new needed phone and it came with a £50 voucher for PC World which I thought I could use to get a dedicated external backup HDD to backup the OS that is on the SSD (about 50-60Gb used) and my games and music on the HDD (only 100GB full).

Window has a backup and restore feature that allows the users computer to backup to a storage device at a certain date/time so I thought I could use this feature with the backup HDD I wanted to get

This is the one that I like the look of spec wise:
http://www.pcworld.co.uk/gbuk/computing-accessories/data-storage/data-storage/wd-elements-external-hard-drive-2-tb-black-22087970-pdt.html

Would you have any recommendations?

Regards