1. First open the windows 10 system and click the Start button in the lower left corner.
2. Then, click Settings in the start menu, and then click Open.
3. Then, click "System" in the settings and click Open.
4. Click the "Save" option in the settings.
5. Then, click Free Space Now on the Start menu.
6. Finally, you can select the junk file to delete in the window and solve the problem.