Speeding up data transfer?

Guys thanks so much for all your replies!

Set up is:

Router => Powerline => Switch & the PC & Nas are hooked up to the switch using brand new cat6a cables.

Here's the very cables I bought.....
http://www.amazon.co.uk/gp/product/B003CL8KAQ/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1
Here's the switch....
http://www.amazon.co.uk/gp/product/B000N9B688/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1
Here's my PC
http://www.amazon.co.uk/gp/product/B00DIVAOH2/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1
Here's my powerline
http://www.amazon.co.uk/On-Networks-200Mbps-Powerline-Adapters/dp/B008O52VN2/ref=sr_1_1?s=computers&ie=UTF8&qid=1409598198&sr=1-1&keywords=On+Networks

Yup, I'm an Amazon addict :lol:

A bit gutted at the moment as I've bought all this new kit & not really seen any increase in performance yet lol

I'm probably due a new powerline & ac router, but at the moment I thought that as the Lenovo, switch & NAS were all at the one end of the circuit then technically the router & the powerline wouldn't matter at the moment.

I read this article on performance http://kb.netgear.com/app/answers/detail/a_id/12242/~/how-to-optimize-readynas-performance-(sparc)(-x86) & figured that my set-up should really be hitting the 17.5 - 27 MB/sec for 'drop & drag' write speeds?

Hope thats a bit clearer & would really appreciate any help/ comments :)