Merging System Partition With Main Partition

For the past several years I've been using 1 partition for my main SSD hard drive.
Today I tried to install a second 4TB SATA hard drive and in the process Windows 7 made a new system partition and moved that to my secondary hard drive...
By unplugging that hard drive the system partition appeared on my SSD. I want to merge it so that I only have 1 partition on my SSD again.
Please see attachments:


Then once I've done that I'd like to know how to set-up a second hard drive with 1 single partition on that as well.
Any help would be much appreciated.
Thanks,
Ben.

Thanks for a quick response.
I was initializing the new drive and it did it then.
What about my first question?
How do I get my main hard drive all one partition again?
Thanks,
Ben.

Are you sure it is how it happened? :)

You had System Reserved (S in your screenshot) all along but it didn't have a drive letter (by default it doesn't). And it doesn't hurt to be there. If you still want it to be gone:

This is the alternative method. Use EasyBCD to move bootmgr to C partition. Then use Partition Wizard free to delete System Reserved (S) and move/resize C into that empty space. Bootmgr - Move to C:\ with EasyBCD

Post another screenshot of Disk Management with 4TB attached. Disk Management - Post a Screen Capture Image

So I managed to set C as active and get the system on there (also did startup recovery etc). Windows booted fine.
I then went into Partition Wizard and deleted the redundant 100mb partition and then extended C to include the 100mb unallocated space.
Since then I've been unable to boot into windows....
I can't access System Recovery Options either.
I get the message:
"This version of System Recovery Options is not compatible with the version of Windows you are trying to repair..."
I've been going through this link:
Troubleshooting Windows 7 Failure to Boot
Nothing has worked.
On number 5:
The first 2 things worked.
"Bootsect /nt60 all /MBR" didn't work. I was told that command was not valid. I was given a list of commands I could do and one of them enabled me to scan for versions of Windows and it found my Windows C. But I still can't boot into it. All my files are there still. Even one called bootmgr...
In Partition Wizard the repair MBR options has vanished. It also doesn't detect the drive as being a Windows drive any more.
Any other suggestions for getting my computer to boot up again?
Can I just do Bootrec.exe Tool - How to Use in Windows Recovery Environment via shift+f10 command line? What does it do?
Beyond that what else can I try to get my hard drive bootable again?
Thanks,
Ben.

Do you have "Windows 7 64bit Repair Disk"? You can create one in any 64bit Windows 7 system. Startup repair by booting to that, or you can also use your Windows 7 Installation DVD to get to System Recovery options.

I hope you didn't mess something up, trying all the commands

I just have my Windows 7 ultimate x64 disc. Like I said, I can't get to System Recovery Options because I get the message:
"This version of System Recovery Options is not compatible with the version of Windows you are trying to repair..."
Should I try:
Bootrec.exe Tool - How to Use in Windows Recovery Environment
What does it do?
Thanks,
Ben.

I am not sure what it does but it requires you to boot from the same DVD, so I wonder if it will work.

Is this the same machine as in your System Spec? You need the correct bit install DVD or repair disk.

You can download 32 bit installation ISO from Microsoft Software Recovery if your copy of Windows is retail.

I'm not sure what you mean. The Windows 7 Disc is the same one I used to install Windows 7. System Recovery Options always worked with it before. I'm talking to you via my laptop if that's what you were asking as I can't boot from my main PC.
I get:
"Reboot and Select proper Boot device or Insert Boot Media in selected Boot device and press a key".