How to Upgrade

Hi,
I have RB751G-2HnD
Version 5.16
In it is Routerboard Current Firmware 2.38
751G-2HnD

To me the information regarding upgrading is ambiguous
so please can anyone assist with the following

  1. Is there a newer version of both OS and firmware
  2. Do I put ALL the files into the root directory and hope for the best?

Thanks & Regards
Eddie

http://wiki.mikrotik.com/wiki/Manual:Upgrading_RouterOS

latest is 5.21 http://download.mikrotik.com/routeros-mipsbe-5.21.npk

Thanks
I tried editing my request but it did not show.
I got this sorted eventually.
Was just afraid to brick it
Regards