After using your iPhone or iPad for a period of time, you find that the machine is getting slower and slower, and iTunes shows that the available space in the system is getting less and less. I don’t know how to clean it up. If you restore the device to factory settings, I am afraid that some important data in it will be lost. The east capital is gone. Today, the editor searched the Internet and found several methods. I did some cleaning on my iPad and found that the speed of the device is much faster than before.

Analytical reasons: Due to USB interface and other reasons, iTunes synchronization Sometimes it fails, and at this time, the video and audio files will suddenly disappear. Sometimes it will come back after syncing again, but sometimes it won't. At this time, from a capacity perspective, the video and audio capacity of iTunes will decrease, and correspondingly, other capacities will increase. Our aim is to find those missing files and delete them.

Cleaning method:

[/private/var/ mobile /Media/iTunes_Control/Music] directory, the directory where multimedia files (such as MP3, MP4, etc.) uploaded by iTunes are stored, and the files are not It has been modified, but the file name has been modified. It can be read directly by downloading it to the computer. For folders that all start with "F", such as F11, F20, etc., steps: Delete the folder starting with F → Restart the machine → Cancel multimedia synchronization → Synchronize again

2. iTunes photo synchronization failed

Reason analysis: Due to unknown reasons, iTunes fails to synchronize pictures and photos. At this time, the pictures and photos originally stored in the iPhone will not be found, but the files actually exist. Picture photo files are in the iPhone's /private/var/mobile/Media/Photos/Thumbs folder. If you have these iPhone pictures on your PC and don’t plan to keep them, you can directly delete all the files in Thumbs and the Photo Database files at the same level as Thumbs. If you still need these pictures and they are not available in the PC, then you can only copy the ithmb file in the Thumbs folder to the PC and then use FOrmat Factory software decompression (search Format Factory.exe in google, there are many download links).

Cleaning method:

Find the [/private/var/mobile/Media/Photos/Thumbs] directory, delete the folder starting with F → Restart the machine → Cancel multimedia synchronization → Synchronize again< /p>

3. The installed program is not cleanly deleted

Analysis reason: The official installation is of course the ipa format file of iTunes, and third-party installation programs such as Cydia (including deb), 91, App directly copy Paste etc. Although iTunes, Cydia, and 91 can be deleted through their respective programs, sometimes the deletion is not clean. The most common thing is to use these programs to install different versions of the same program. Sometimes you will find that you can install them all, but there is only one in the iPhone, and you have forgotten how many times you installed it and which versions you have. In this way, there is more and more garbage in the iPhone. In this case, you can only enter the corresponding folder and open the search.

Cleaning method:

① ipa is installed in the /private/var/mobile/Applications folder. You can roughly determine where the software is based on the installation date.

② Cydia, 91, manual installation is placed in the /private/var/stash/Applications folder. The folder names here are clear at a glance. Find the software you want and delete it directly. The premise is that you have deleted it once on your iPhone, but it has not been deleted completely. That is, you find a software that you have deleted in these folders, but its folder still remains.

　③[/User/Media/ApplicationArchives/] directory can be safely deleted, which contains the software compressed package that has been deleted in error.

　④【/tmp】The newly discovered iTunes synchronization or deletion failed files, folders named with install_greenmile.XXXXXX type, delete them. (See the picture)

　⑤【/User/Media/PublicStaging】The redundant file path that failed to install iTunes discovered on June 14th. (See the picture)

4. The files in the file management software are not deleted cleanly or remain in the recycle bin (actually not deleted)

Analyze the reasons: For example, Mobilestudio file management software. You can delete, copy and paste, rename, etc. in Mobilestudio. But Mobilestudio has a recycle bin, deleteAll files are in the Recycle Bin. If you don't empty the Recycle Bin, the files are still there. Of course, other capacity will not be released. Another example is the famous iFile, which does not open the recycle bin by default. If you open the recycle bin, you may forget deleted files.

Cleaning method: Find the recycle bin folder of the file management software and delete the files in the recycle bin.

5. Software manually installed by Cydia, 91, and App are included in other capacities. If you install all the software through these programs, then there is no need to make a fuss that the others are so huge, and the miscellaneous items are all there. If you don’t want it, delete it yourself

　①[/private/var/mobile/Library/NetDragon/Applications] is the path of junk files left after the 91 program fails to install. You can only delete the program that failed to install. If you delete Deleting the folder will cause the program to be unable to open

　②【/private/var/cache/apt/archives/partial】Cydia will delete the downloaded content from time to time, and cydia will Downloads can be resumed at breakpoints. If you reinstall, you may continue to download. If you start from the beginning, the undownloaded parts will be automatically deleted. If there is something you don't want and the deb file has not been downloaded, you can delete it directly.

　③【/var/mobile/Media/ApplicationArchives】When you open iTunes synchronization on the second computer, if the computer does not have the software on the iPhone, you will be prompted whether to transfer the software to the current computer. This directory is where the APP software in the temporary ZIP format is generated. If you have it, you can safely delete it!

6. E-mail attachments are also in Others. If you have undeleted email attachments, or download them Email attachments can be deleted to free up space

7. If you have installed the Safari download plug-in for the ipa and deb downloaded by Safari, do you remember to clear the downloaded files?

8. Delete any virtual memory left in the [var/vm] directory from previous installations

9. [var/mobile/Library/Caches/] directory, if there are virtual files starting with Proswitcher, then Delete it (never delete all the files in this directory directly, otherwise all your programs will become other programs, and it will be useless to back them up! Don’t!)

10. Files copied by yourself are the most common The ones are font files. For example, FY copied a 230M dictionary library to the Dictionary Universal directory. Itunes shows 3.47Gapplication, and use iFile to view the Applications directory, it is 3.71G, the difference is exactly the dictionary library, delete it yourself

11. Cleaning path of temporary files downloaded by mobile phone (only for iOS5.0 system)

//User/Media/Downloads This directory contains downloaded temporary files and can be safely deleted.

Note:

A. Please back up the files before operation, just in case.

B. After deleting directly with i-FunBox in steps ①②, you must shut down and restart the machine (logging out has no effect), otherwise pictures, music, and videos cannot be synchronized and played normally. Because deleting it directly in i-FunBox will not update the iTunes database. Some children's boots have synchronization problems, which can be solved by restarting the machine. This is emphasized!

C. Abandon 91 Assistant and found a miserable picture on the forum. "Others" took up more than 4G. That friend used 91 to install PXL format software. These software are not used. iTunes recognizes it and becomes "Others"

D. "Others" cannot be completely cleared. "Others" on a newly refreshed machine will occupy 200MB. After i-FunBox directly deletes the media folder, click Sync directly. , will "temporarily" eliminate "Others", but this is an illusion. After restarting the machine and synchronizing again, "Others" will come back.

E. "Others" will not affect the stability and use of your machine at all. They just take up some space. Those with a few hundred megabytes are normal. Those with a few gigabytes can self-check the above items. If you like If you are struggling, you can streamline "others" as much as possible according to the methods I listed.