Just a note, you can always rename the drives by right-click on the drive letter and clicking properties, it should be right there.
Now if you want to save the files on your D: and copy & paste wont work, boot to dos and do:
copy D:\* c:\d_backup
or whatever you want the names to be. Google.com for a tool called "Unlocker". This is a handy little tool that installs itself right to your right-click menu. Just right click on the file and click unlocker then delete. That will take care of the permission denied error you probably get.
OR
Boot to dos and do:
deltree /y D:\*
That will delete everything in your D:\. Any questions, reply.
josh_rain