1. Find the setting on our mobile phone desktop and click it.

2. Click Personal Information at the top of the screen.

3. Click iCloud in your personal information.

4. Then click Manage Storage Space.

5. Then click Change Storage Space Scheme to expand the memory by changing the storage space.

6. If you need to expand to 5G, it is free. If 50G is selected, select the purchase plan and click Buy.

7. Finally, just enter your Apple password. Now your memory has expanded to 50G.