How do I free up space on my Wii U?

How do I free up space on my Wii U?
Complete the steps:

From the Wii U Menu, select System Settings.
Using the Left Stick, scroll to the Data Management and press the A Button.
Select Copy/Move/Delete Data.
Select the location of the data you wish to delete.
Select the application that has the data you wish to delete and press the A Button.

Complete the steps:
  1. From the Wii U Menu, select System Settings.
  2. Using the Left Stick, scroll to the Data Management and press the A Button.
  3. Select Copy/Move/Delete Data.
  4. Select the location of the data you wish to delete.
  5. Select the application that has the data you wish to delete and press the A Button.