There are cases when you have to change the location of Exchange database files.
You might be willing to improve the performance of your exchange server. Another serious reason
could be the Exchange database partition running out of space.
Here you can see how this can be done.
I just finished the "Upgrade from Exchange 2007 to 2013" Part I screencast and must tell you that it is extremely well done! I found no variances between the video/script and what I experienced. At the end of Part 1 ...
Bob Duffett, Priority Software Inc. ...more...