If you can load windows off the SSD drive.
Once windows has loaded.
Click on the start button of windows.
In the search box type : Disk man.
From the top left in the search results.
click on
Create and format disk partitions.
In the new window look down the drive listing for the SSD drive.
Check to see that you have the windows partition, and also a system reserved partition displaying also of around 350MB.
The rest of the drive space should have a black bar above it on the ssd drive saying un allocated.space.
Right click on that space.
And select format, and the type of partition to create.
once done, go to the far left gray box where disk 0 to disk 4 for example are right click again.
and set the drive condition via the pull down menu to Online if not already set Th3_Dud3
Exit disk management.
Then restart you system.
You should now have a new drive letter showing in windows file explorer.
That should when right clicking on the drive all of the drive space that is missing.
Or was not reported as being used.
Also don`t forget that you cloned the mechanical drive image over to the SSD drive.
And you cannot have the same drive duplicated connected to the system as it will cause a conflict in windows.
What I mean is, if you disconnect both the sata data cable and power from the old HD used.
Restart the machine.
You will likely see and get access to the D: partition that should of been created on the SSD drive.
Try it.
You then have to format the existing HD. or change the working drive letters of the old HD still set as C: for example then D: if it was partitioned.