Windows 10 assigns an available drive letter to a new drive connected to the computer. The operating system goes through the alphabet from A to Z to find the first available letter to assign it to various drives. It is possible to remove a drive letter assigned by the OS.
In Windows, you can hide drive letters in File Explorer. They will disappear from both the navigation pane and the This PC folder. This can be done with either Folder Options or a Registry tweak. Here is how.
By default, Windows 10 automatically assigns drive letters to connected drives, including internal and external drives. You might want to change these letters. Here is how it can be done.