You can just add the new hard drive to your computer and keep the OS where it is on your old hard drive. Then just transfere what you want to the new drive. What is your old drive and what is your new drive?
Do you happen to have a Z68/77 motherboard? If so, a 60GB - 64GB SSD setup to cache the main drive will make the system feel many times faster than the fastest mechanical HDD. And 60/64GB SSDs are less than the cost of a hi-speed 640GB HDD. http://www.newegg.com/Product/ProductList.aspx?Submit=E...
You have to have a board that works with Smart Response Technology to use the cache feature however.
A good option to think about is to get a SSD for the OS and your current drive will then be storage and apps and games that you don't want on the SSD. There are a variety of sizes of SSD's and depending on your budget you can get a 128 gb or a 256 gb. I use a 256 gb for the boot drive and that has room for Win 64 bit and a couple of games so you can actually fit 4 or 5 games comfotaby and put movies and photos and storage files on the old hard drive.
For $200 you can get this Samsung 830 256 gb and it's the same as I use and I get a 7.9 WE with it. Ganmes load faster and apps open quicker , it just makes the over all performance of the Pc much faster.
I'm going to buy a new hard drive and I want to transfer all of my data and the OS to from my old HDD to my new HDD, is there a way to do this????
Or is there a way to use my old HDD for the OS and use the new HDD for my files and games??
It would be better to do a whole new install on you new drive. After you install Windows on your new hard drive, plug in the old drive and just copy everything over from one hard drive to another; simple as that.
Some people recommend a SSD, it's a good idea, but for games it's not going to have a large impact. Games will only load a few seconds faster, most games load almost instantly or take a few seconds when I used a normal mechanical hard drive. Windows loads in mere seconds though which is awesome. A 120GB SSD is more than enough for Windows and programs as long as all your data is installed on a mechanical drive.
If you wait another year SSD prices will drop to 25-35 cents per gigabyte at the rate they are going.