Understood. I am too affected by this and used diskpart to remove the drive letter. For me G was assigned.
Right-click Start>Command Prompt(admin)
Type in the following:
diskpart
list volume
select volume 3
Replace 3 with the number of the volume which is assigned a drive letter.
remove letter="G"
Replace G with D
Don't worry, removing a drive letter would not cause any harm to your device.