1. First find the settings on the iPhone and enter them.

2. Select General after input.

3. Find storage space and iCloud usage under general use.

4. Then select Manage Storage Space under Storage Space.

5. Find the system update package again.

6. Click System Update Package and select Delete Update.

7. Finally confirm the deletion, so there will be no pop-ups. If you need to update the system, you can download and install it again under Settings-General-Software Update.