Even though it was a mirror edition I had only one volume, 1TB. (western digital encourages you to turn it into a mirror so that you get two volumes, however the real storage space would be 500GB since the secondary volume is just a backup).
Today I plugged it in and windows told me that there are some errors with the unit, he asked me to either analyze and correct the errors or to continue without analyzing, I selected "analyze and correct", then windows told me that in order to keep going with the analyzing process he had to restore the unit, so I clicked on "restore" because I was confident it was the right thing to do and because windows didn't tell me that all the files would be deleted from the hard drive.
Unfortunately the restore process didn't end, it got stuck, and so here I am, I cannot access the hard drive from windows, and I don't know what to do.
I downloaded Recuva, and I was very pleased to see that recuva could see all of my folders and files in the hard drive, however Recuva's purpose is to restore deleted files, not files that have errors.
Please guys, if you know what can I do in order to get the hard drive back up and running, without further damaging files and folders, tell me.
Here I posted the screenshots of testdisk:





When I'm in "My Computer" and double-click on the hard drive it says:
"It's impossible to access to D:\
Access denied."