How to prevent extra folders from being created in my external SD card?
In KitKat by default, non-system apps (for example Es file manager) cannot make changes to the external SD card outside of their data directory due to security policies.

To get around this issue, you can use your device's built in file manager to manage the external SD card.

If your device doesn't have a system file manager, you'll have to root the device to give Es full access to your storage.