The normal use of mobile phone applications will produce useless data, especially the software that plays videos. Their videos will be cached in the mobile phone before playing, so a lot of data will be generated. Remember that words, pictures, videos and sounds of any software you open will become data and be stored in your mobile phone, which will consume your storage. Only those cleaning software can be used for simple cleaning, or the mobile phone slimming software will clear all the software data and log in to the software again.