...and add system files to it, you'll need to install an operating system on the drive.. You can do that by using the original Recovery discs or installation CD or it's also possible to mirror the original drive and copy the mirror over to the new drive. Once that's done, you can format the original/smaller drive and use it as storage..
Of course, if you want to keep the original 20 GB drive as the boot drive, you can make the second larger drive a "storage" drive and simply change the jumpers on the new drive so it's "slave" and plug it in.. Once that's done, you should be able to format the new drive and use it as you choose.
Hope this helps.
I have an old Dell Dimension 4300 with only 20 GB hard drive which is almost full. I purchased a 180 GB hard drive and installed it in the computer. How do I change the master and slave drive and how can I make this new drive a bootable drive when I start up the computer? I know I need system files on it but how can I transfer these system files from C: to this new hard drive?
Thanks for the help.