1. During the operation, data is lost or not recognized by iTunes due to system reasons, so that the capacity of other columns will suddenly become huge;

2. Other capacity increases caused by using third-party PC-side software (not iTunes) to install software and store files and data.

Solution:

Find out those missing files and delete them. The video and audio files of iTunes are in the folder/private/var/mobile/media/itunes _ control/music, F00-f1* *12. Whether it is audio or video, the file name has changed after it is put in, but it can be found by synchronization time or file size. The lost files are also in these folders, so how to enter the folders is not specific. Winscp and 9 1 will do. It should be noted that it is necessary to determine whether the video or audio to be deleted is lost. You can copy the file to your PC and open it to make sure it is clear.

File management programs, map programs, dictionary programs and book programs all consume other capabilities. What we need to do is to calculate the file capacity in these programs and whether it is consistent with other added capacities. If you don't want these files or books, please clean them up frequently and delete unnecessary dictionaries, map caches and unnecessary files.

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How to clean up the memory space of mobile phone?

If the memory space of the SD card is insufficient, it is necessary to clean up the packages that are not commonly used in the SD card, or pictures, videos and music, and replace the SD card with a larger capacity if necessary.

Mobile phone memory is insufficient, so you can use cleaning software to clean up mobile phone garbage and release memory.

Close some mobile phone background applications, delete redundant installation packages and so on.