Hi, being more Windows oriented I may be able to help here.
As well as the new drive you will also need a means of connecting it to the computer with the existing drive still in it.
You then download and install on the existing computer and drive a free program called Macrium Reflect. You then use Macrium Reflect to create a clone of the existing system onto the new hard drive.
Once the clone is on the new hard drive it is just a simple matter of remove the old drive and fit the new one in its place.
The computer will boot up and run just as it did before.
You can then expand the last partition into the empty space.
Rather than the Windows own partition program, which is basic at best, you can install and use a third party Partition making and moving software, there are quite a few. I personally use EasUS Partition Master.
So here is how you do it, as well as the new drive, you need a means of connecting it to the computer to put the clone onto it, I would recommend obtaining an enclosure, they are not too expensive, and once it has been used for making the clone, the now spare small old drive can be fitted to make it useful as an external storage device.
Just for example here is an enclosure case, you may find cheaper deals elsewhere.
The next thing you need is to download and install Macrium Reflect, from here
If you use the download link supplied, be aware that there may be other junk offered during the install process, where offered a custom install, use it so as to remove ticks for things like tool bars so called free security scans etc. Read carefully every page and window that opens during the installation to be sure you don't include unwanted junk.
Once Macrium is installed, and the new hard drive fitted to the enclosure, connect the hard drive and enclosure to the computer and then open Macrium Reflect, you should see the existing hard drive © and (E) partitions included, click on the "Clone this drive", and then navigate to the new drive as the destination, making a clone is quite easy and a lot is self explanatory.
It may take a couple of hours to make the clone, depending on how much data you have on the existing drive. Just let it get on with it till it completes.
As said earlier, all you need to do next is shut everything down, Computer and enclosure, then disconnect the enclosure and remove the new drive, then swap it for the existing old drive.
If at that point the computer refuses to boot, it may be because your computer has UEFI with secure boot enabled. Let us know if that happens.
However if an older computer it may not have UEFI so all should boot up OK.
Once everything is up and running, do take note of the advice to back up the (E) drive as a just in case, also you already have the original smaller drive to rely on as well.
Next is to download and install the EasUS Partition Master if you wish to try using that instead of Windows own partition manager, you can download it from here
I give the same warning to watch out for and stop unwanted extra's during installation and download.
See how you get on and any problems don't try going further, just ask and we can help sort them out.
A quick edit. You haven't said if the computer is a desktop or laptop, if a laptop you will need a 2.5 inch drive as the new drive, if a desktop it is likely to be a 3.5 inch drive, you need to be sure of that for getting the right enclosure, as well as the fitting it to the computer after making the clone on it.
Edited by Plastic Nev, 25 December 2014 - 02:31 PM.