Sometime we required to change our drive letter as we assume certain letter to use for specific purpose.

Here is how u can change your drive letter :

1. Open Control Panel -> Administrative tools -> Computer Management
   
   
2. Then go for Disk Management under storage tag:
   
3. Then in the right side pane, you will able to see your Drives, Right Click on your required drive
 
4. Click on Change Drive Letter And Path, a new dialog box will open showing your selected drive, click   on "Change"

5. After that, assign your required Drive letter