thanks for that, i am going for this option -
How do I move Steam from one PC (or location) to another?
The quickest and most hassle free way to achieve this is to just copy and paste your entire Steam folder to it's new location and to then Run the Steam.exe file within it.
Sometimes when doing this, games will state that they are not installed in the list on Steam. If you click to install these games, Steam will instantly "download" them from the files you've already got and the game will be installed again.