Hi
I really can't recommend doing anything to the drive before recovering your data from it.
Doing anything like trying to create an additional partition on it could not only lose your data but make the computer unbootable.
I can speak with experience on this one since just recently I added a partition to one of my hard drives that had Windows 8, my primary operating system on one of the partitions.
Drive 1 in the image above, the partition named now named New Data, is where Windows 8 used to be and where my final install of Windows 10 will go.
For some reason this caused the hard drive to be converted from Simple to Dynamic, (if I had paid attention to the popups I could have avoided this) and at that point it became unbootable.
Fortunately for me, I also had Windows 10 installed on the other hard drive.
I had to boot into Windows 10 and painstakingly copy everything on the drive to an USB external hard drive.
Then I had to format the drive, partition it, and then copy everything back to it again.
Since it is the drive that has all my Windows 10 software on it along with all my games and a lot of graphic files it took forever.
But when I was done I had all my files back, but Windows 8 was gone forever unless I want to start from scratch and reinstall everything.
Since you don't have the space to copy the material to the other hard drive I'd recommend buying an external USB drive and recovering all of you stuff to that.
They are pretty reasonable anymore.
http://www.amazon.com/Passport-Ultr...79948&sr=8-1&keywords=external+usb+hard+drive
I really don't see anyway to make the drive readable in the normal manner since I don't have any idea what's causing it to be unreadable, but I'm afraid that messing with it may make things worse.
Mike