1. Open the computer setup interface and click System Options.

2. Click the Save button in the lower left corner of the system window.

3. Click the Configure Storage Awareness or Run Now button in the Storage window.

4. Click the "Clean Now" button at the bottom of the immediate release space.

5. In the previous storage window, click the button to change the storage location of the new content.

6. Set the default storage location of applications, documents, music, pictures, videos and maps to non-C drive. At this point, the memory occupied by drive C has been reduced, and you're done.