Share an effective method to solve the problem of excessive occupation of system data space

I don't know when Fruit introduced this wonderful thing [System Data], but it was tortured by this ghost thing with [storage phobia]. Every time, no matter how new or old the machine is, no matter how big the storage is, it has to be stuffed with more than 80% to avoid the system swallowing space... Until yesterday, I just deleted more than 10 GB of movie files, and after slipping for a while, Safari was swallowed 5GB!!! I really couldn't bear this. In a fit of anger, I installed a troll to run Filza and started working on the system directory! At present, after finishing [system data] has dropped from the original 35GB to about 5GB, fully free up 30GB space!!! * * known circumstances * * * * System data and * * 1. It doesn't matter if Apps are cached! 2. It has nothing to do with Swap! (It's not the previous N82AP era, there's no need to open a 2GB Swap) 3. Planned scrapping related (suspected), it is full of dump files, various system logs, component download caches, completely useless db libraries, apps residual files, previously deleted photos, etc. * * Prerequisites * * 1. TrollStore support 2. Jailbreak equipment (for those that fail to meet condition 1) 3. iMazing (for those who cannot meet the above three points, but the directories that can be organized are very limited) * * Collatable catalog * * Table of contents description --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- /var/db/diagnostics/Persist < br > < br >/var/db/diagnostics/Special < br > < br >/var/db/diagnostics/Signpost are diagnostic and system Dump files, respectively; < br > < br > The fruit design is sorted out in a month or when there is insufficient space. This is also the reason why many changes are cleared. However, in fact, this method has long been ineffective and it will hardly be cleared in actual experience. The occupancy will increase over time /var/logs * * Open directory to non-jailbroken users; * * < br > < br > Log file, safe to delete. /var/mobile/Media/PhotoData/OutgoingTemp * * Open directory to non-jailbroken users; * * < br > < br > The directory is not affected by the automatic cleaning mechanism. It increases with the camera and photo library, so it must be cleaned regularly. < br > < br > Guess that photos and videos are selected to Share with other Apps or cache files when shooting. If the space of deleted photos does not increase, there is a high probability that they will be thrown here. /var/mobile/Library/Photos/Libraries Photo Library file of unknown significance, * * This Library also exists on MacOS * *, and its usage will increase over time. /var/mobile/Containers/Data/Application/AF123B6C-2B94-4C96-810A-0D79EEC3EA59/Library Safari cache directory to completely clean up cache files; < br > < br > Different versions may have different numbers, just find * * Safari * * and click on it. /var/mobile/Library/Caches/< br > < br >/var/mobile/Library/Caches/com.apple.cache _ delete apps files unload residual and miscellaneous system cache So far, I have explored these. If V friends find other discoveries, please share them below.