Default [Q] Rooting My Samsung Tab 2

I've read instruction's from the web on rooting my Samsung Galaxy Tap 2.
First, the instructions mention to allow USB debugging but I find no setting for this in my apps menu.
I was also instructed to put the device in download mode but the device got stuck at Downloading.... for around 15 minutes until I restarted by holding the volume up and power.

Any ideas what I'm doing wrong?
James