Mobile phone memory is getting less and less. What happened?

There is always a cache in the process of using the application. The longer the time, the more cache and the more space it takes up.

Mobile phone memory refers to the built-in storage space of mobile phone, also known as "flash memory" or ROM. Mainly used to store software and data, equivalent to the hard disk on the computer. Applications, files, songs, photos and system files downloaded by the mobile phone are stored in the memory of the mobile phone. Some mobile phones can expand their capacity through SD card or TF card. The larger the memory, the more files they can store.