C drive D drive somehow got swaped

C: drive & D: drive somehow got swaped.?

my C: drive shows 13GB of memory while my D: drive shows 55GB of memory.

Funny thing is all the correct files are on the C: drive and it's using 93%(programs, documents, music, pictures, etc...).

My D: drive has only four files and is using only 1%.

I want to designate the drive with the most memory available as the local C: drive. How can I accomplish that?..

Thanks in advance for the time and the help, appreciate it.

Other Answers:

You have to move your files to the D drive manually. Actually, this partitioning was done intentionally, so that a) your operating system would perform better because the partition it's installed on isn't full of files, and b) if you have to reinstall Windows, you woudn't lose all of your data.

If you really want to make one drive for everything, open Disk Management, delete the D partition (first, make sure there's nothing important on it!) and expand the C partition to fill the remaining space.