You can't access files on d: exactly as file on c:, because the drive-letter is different. So you would have to go to another drive.
It's transparent if you move a folder like My Documents (via its right click properties) that you don't access via a drive-letter. But for all other files - after moving the folder - you'll notice the drive they are on is different. But that's only a minor difference.
Don't move files from
- the root folder
- program files
- other folders than My Documents in your profile
My C: drive has 74Gb NTFS but has only 15 GB left, but my D: drive has 55GB free out of 65GB. What do I need to do to utilise all my disk space and still access my files as if they were on C:? Vista 32 bit laptop.