My Xiaomi 4 can only store ten short messages. What happened?

This may be related to the full memory of the mobile phone. The following are specific cleaning methods:

1, open the phone, and then enter the file management of the phone.

2. Then clean up the unwanted videos and photos in the mobile phone.

3. Then enter the message again and clean up the message inside.

4. Then try to call the operator and get a text message.

5. If the above operations still can't be solved, try to clear the data of the mobile phone.