If a removable storage device is mapped to a drive, Microsoft Windows remembers this mapping and will try to use it again next time the removable storage device is used. If that drive letter is no longer available, the removable storage device does not become visible. To prevent this, select Settings > Map Removable Disk to first available drive letter starting from and provide the drive letter of your preference. If you enable this option, Workspace Control will first try to map the drive to the preferred letter. If this is not available, it will proceed alphabetically until a free letter is found. After Z, it will start at A.