There are a couple of things you could do, but I am pretty sure what you're thinking of is creating a spanned volume. You would have to convert both disks to be dynamic. It can be done in w7 pretty easy, but honestly it is kind of a dumb idea. Well that depends I guess. Are you using an HDD as your main drive? if yes it is a dumb idea. What you should do is clone your hdd to your new sdd using the software that will come with the new drive. Then format your old drive and place it as a separate volume. I hope that makes sense. The new ssd will come with a disk just run through the instructions you should be fine. As far as formatting the old drive you can just google using disk manager to format a drive and you will have more info than you need in like 30 seconds.