This situation may be due to the lack of memory due to more software installed on the mobile phone, or the mobile phone itself has more cache. I suggest you clear the system cache and observe it again. The way to clear the cache is to turn off the phone. Press and hold the power button and the volume down button at the same time to enter the recovery mode. Select the option of clearing the cache through the volume button to restore the factory settings of the mobile phone, and the system will automatically clear the cache for you. Clearing the cache can free up more space for your favorite computer to run. You can improve the running speed of your favorite machine.