New 2TB drive - format problem?

I've just added a new Seagate 2TB drive to my 64bit W7 system, because I was getting low on storage space, but I'm not sure I've done it properly.

I used Disk Management to format the drive (MBR, my motherboard doesn't have UEFI) and it took around 3 hours. But afterwards, reading about it on the Internet, it seems that I should have partitioned the drive first.

The attached gif shows the current state of the system. As you can see, the New Volume has no drive letter, and doesn't show up in 'My Computer'.

The drive's 'Right Click' options are:
Mark partition as active
Change drive letter and paths
Format

Okay, I guess I could use the Change drive letter and paths option to allocate a drive letter and a label, but what about the Mark partition as active option? Isn't that intended only for a bootable\system drive? I'm pretty sure I read that here on the W7 forum.

But how does that jell with my D drive (see the gif) which is also shown as 'Active', even though it has no OS on it?

Advice please

To the 100 or so folk who've looked at my query and were unable or unwilling to offer any insights - trouble yourself no further - I've sorted it out myself.

Layback Bear, thanks for your input.
As I said, I sorted it out myself, so no help required now.
Cheers

Seems OK now. I spent all yesterday moving stuff into the new drive.

I think what baffled me was I hadn't built a PC for two years (IT was my business before I re-retired and moved to an area where there are more cows than computers), plus I was used to creating systems on new, unallocated drives, where the OS installation does its own partitioning.

Having got this one to work by formatting first, rather than partitioning, as some pundits recommend, I don't see the point of doing it their way if there's only one partition required.

Another thing I wasn't certain about was whether I needed to make the new volume active, given that both my C and D drives were in this state. I'd forgotten (duh) that D was originally a system drive but when I added C, I slaved D and deleted the Windows folder.

But apparently, you can have multiple active partitions in a system, provided there's only one to a disk, and the BIOS points to the boot drive.

Cheers

That's true, but it's functioning perfectly well and I'm not inclined to risk screwing it up.