First of all, simply understand what data is contained in the memory of other systems:

1. The system downloaded by the update system occupies memory;

2.iPhone hard disk is full data encryption, and all data encryption takes up memory;

3. Most privacy-related data of the 3.app will be left on the iPhone, including iCloud data, and the iPhone will automatically encrypt it and send it to the iCloud cloud, so the cached privacy data of all apps will occupy memory;

4. Some system operations identify problems and codes.

5. Application running data. Although the iPhone does not need to manually slide up to close the application background after opening multiple applications, it still occupies the system running memory and documents and data used by the applications.

6. System memory. The memory occupied by the iOS system will be changed when it is updated or refreshed.

It can be solved by the following methods.

First, restart the device.

Clean up general system data, such as temporary files.

, activity log, background running, etc. If it is restarted, the iPhone/iPad will automatically shut down or clean up these memory-consuming data.

Second, delete the data that has not been thoroughly cleaned up.

Some of them we thought were completely cleaned up, but in fact we still kept the relevant data.

For example, after photos and videos are deleted, they will be kept in the recycle bin for 30 days, and then they will be completely deleted.

For example, App software, when it is no longer used on the desktop, do you think it has been completely cleaned up?