Hi Doula,
I have some bit of experience doing this so I will pitch in with some guidelines for you. It's best to use Macrium Reflect for your cloning software as we have tested in on all versions of windows from XP-Win10.
The first thing I recommend you to do is to watch this excellent video from Britec on how to clone your drive using the Macrium software here:
After you watch this, you can continue reading these tips.
It's always best to clone on a desktop PC versus a laptop if you can. Laptops also work, but they take more skill to do so, and since for 99% of laptops they only have 1 internal hard drive not 2, so the clone time will be significantly longer. It still works but you need to be aware of it. There are also some other quirks with laptops but I won't go into that unless you post back you have one.
Normally, on a desktop PC you'll have to open the case to install your 2nd hard drive into the computer, using both power and data cables. Many modern desktop PCs do not have either a long enough power cable or long enough data cable to reach your 2nd drive, even if you install the 2nd drive into a prefabricated drive bay. In this case, you'll need to buy longer power cables and data cables to connect the 2nd drive to the Motherboard. In many cases, you can buy cable extenders. All those are available at most computer retailers such as Best Buy or newegg.com online. Normally those longer cables or extender cables cost about
$20 US. Once the 2nd drive is properly installed inside the PC case, and you start it up, the BIOS should see the new hard drive as Drive ID #1, or #2 depending on how many SATA connectors are on your particular Motherboard. Often there are 5-10 of these SATA connectors numbered 0-9. If your existing
C: bootdrive is connected to
SATA PORT 0, then you'll want to connect your new hard drive to
SATA PORT 1 if possible, but really any of the other SATA ports will do.
When you boot your PC into Win7, and you go to My Computer as in the video, you should see the 2nd hard drive listed on that screen under storage. You should see the size, and it may not show usage only capacity if you haven't yet formatted it. If you hit the
Windows-logo-key and R together and type in the command
DISKMGMT.MSC, it will bring up the Windows disk management utility and you can see how that drive fits in to your system configuration also as in the video.
Once you have this done, you can follow the video to see how to clone your existing
C: bootdrive onto the new 2nd hard drive you physically installed into your PC. To test this, you can follow neemo's instructions on setting your Boot Order or Boot Preference choice to put the original
C: bootdrive as your first hard drive in the boot order and the new cloned drive as the next drive in the boot order. To test your newly cloned 2nd drive; I like to physically go back inside the computer case and disconnect both the power cable and the data cable from your Drive 0, or
C: bootdrive. In most OEM PCs, when you do this, the BIOS should then default to the only hard drive now physically connected to the PC Motherboard and powers up from the Windows partitions on the 2nd hard drive. If successful, your Win7 will boot up and all your stuff and desktop settings will be there and look identical to what you had on your original hard drive or
C: bootdrive. 
This is the only way to test this works, as it does a 100% simulation of a
C: bootdrive failure.
Now, with some
OEM PCs, (OEM are like Dell, HP, Acer, Gateway, etc.) especially self-built PCs or custom-built PCs, the Motherboards have a quirky where the BIOS won't properly scan the 2nd cloned drive if it's not plugged into the
SATA PORT 0 connector on the Motherboard. In some cases, the manufacturer will have a newer BIOS update that fixes this, in many that problem is never fixed.
If you have one of these computers, you will have to use a workaround, and if your
C: bootdrive ever fails catastrophically, your PC won't automatically switch over to the backup clone drive.
In this case, and I have this problem with my Dell Studio desktop, you have to turn off your PC and open the case, and physically use the 2 cables (power & data) that were originally connected to the
C: bootdrive and connect them to the 2nd clone drive connectors after removing the 2 cables already on there. If you do this correctly the BIOS will be able to read the new
C: bootdrive (which is now the Clone drive hooked up) using the existing power cable and
SATA PORT 0 data cable used by the original
C: bootdrive, and then your Win7 should boot from the Clone drive and it should work if you did it correctly!
Remember that it's really critical to test your PC to see whether or not it will work automatically or not. Worse case, and you suffer a
C: bootdrive failure, and your PC is like mine, you just have to open up your case and swap your cables around. That takes 5 min. and you can be back up and running in that time compared to 2-3 weeks for a complete Windows reinstallation from Recovery media, reinstall all your programs and reintegration of your data...Ughh! I have this setup now on a couple of Client computers, and so far so good. I've tested them, but as yet they haven't suffered
C: bootdrive failure it hasn't been tested in a recent Client environment, but I expect and hope it would work as I inteneded.
Edit: If you do this setup and test it with the Macrium clone software, remember to set a pre-programmed schedule for clone backups from within the Macrium to do daily or weekly clone backups, and enable overwrite, so that each new clone backup overwrites the old one; otherwise your backup drive will be clogged up with cloned images in no time. Once you have your daily or weekly clone backup set, it should be set it and forget it.
On one of my most important Customer's I have with this setup, I have the schedule to do a weekly Clone backup as his home where I live is a part-time vacation home and the PC there is only used when he occupies the home on vacations. On a daily-driver PC you might consider setting your schedule to do daily Clone backups, and if a primary drive failure occurs you'll only lose 1 days worth of data as opposed to up to 1 week's worth.
Hope these tips help you.
<<<BIGBEARJEDI>>>
