Solved Windows is only seeing 2TB of my new 3TB drive.

I bought a 3 TB drive today, to replace my, existing 1 TB drive which was 95% full. This is my "D" drive and is
data only, no OS on it. Its actually all my WEB server data, for IIS. (I'm on Windows 8.1 Enterprise 64 bit).
My plan was to use Paragon Hard Disk manager and clone my existing 1 TB, D drive to the new 3 TB drive which was
on an external ESATA. In the past I've successfully used Paragon to clone my OS drives from spinning to SSD.
Sometimes the Source drive has been bigger than Target, other times vice-versa...have never had an issue.
Being this is data only, my main reason for using a clone instead of copy is to capture all the security, network
and other drive specific windows settings...not having to go in and redo all that. I'm figuring if Paragon has
successfully cloned an OS, this should be a breeze...and it was ...cloned and swapped.

My issue, I notice my 3 TB drive, windows is only "seeing" 2TB. (2048 GB) and leaving 746.52 GB as unallocated.
Windows disk manager screen shot below:

500 - Internal server error.

I'm guessing I could make an "E" drive of 746 GB...but, I'd rather have all 3TB on the "D" drive.
Using Minitool partition wizard I try to extend...and get "not enough free space" (I'm using 779 GB of the 2048 GB)

500 - Internal server error.

Going back to Paragon...and trying to resize the partition...it shows the max as 2,097,151MB

500 - Internal server error.

I'm sure...or am hoping this is an easy solution, but don't want to "just try something" and loose a lot of data.

Please advise.

Why is only 2TB of my new 3TB drive showing up ?

If it's a mbr disk 2tb is the limit if you want to use all of it you need to convert to got disk you could then copy data with built in robocopy

I never knew robo copy could do that... good to know. I got it sorted out using paragon, the same tool I cloned it with

You can get a free GUI for robocopy now makes it simpler been around for years built for servers very fast

I THINK, I have the robo copy GUI... isn't it a GUI, u can fill out the. fields , and run... and it will also write out the code for you if you decide to use CAD prompt. can you show me a link to the GUI you are speaking of?

https://betterrobocopygui.codeplex.com/ is one but the ms one is https://technet.microsoft.com/en-us/library/2006.11.utilityspotlight.aspx