We can assign letter (from C: to Z:) to each drive in our
computers. Letter A and B are usually reserved for floppy disk drives, but if our
computers don’t have floppy disk drives, we can assign A and B to volumes.
To
change drive letter on dynamic disk, please follow the steps:
Step1:Launch AOMEI Dynamic Disk Manager

Step2: Right-click the volume you want to change drive letter, for
example E: drive, and select “Change Letter”.

Step3: In the pop-up window, choose a letter you want to use.

Step4: Finally, click “Commit” to perform pending operations.

You can choose whichever drive letter you like with Dynamic Disk Manager. Free
download it to check how it works.