The main reason is that the software and temporary files are in the memory of the mobile phone, so the running memory space is insufficient, not the storage space of the SD card is insufficient.

The following methods are recommended:

First, set the default storage location of the SD card.

In this way, downloaded and installed programs and files are transferred to the SD card.

Open the system settings, open the memory, and select the storage location of the SD card.

Second, move user software and non-system programs to SD card.

For example, 360 mobile assistant, Baidu mobile assistant, system deep uninstall and so on.

1, mobile phone installation depth uninstall.

2. Open the software and select more functions.

4. Select the software to be moved, select the software to be moved, and then click Batch Move to OK.