Check out how to easily wipe cache partition in SAMSUNG Galaxy A70. This operation won't affect your personal files it will only remove temporary cache files. As a result you can refresh Android 9.0 Pie system and optimize Qualcomm Snapdragon 675.
First of all press Power key, release it when the menu will appear, from the options choose "Restart".
Afterwards, when the Samsung logo pops up hold down Power + Volume Up keys simultaneously for awhile.
Release all keys when you see the RecoveryMode menu.
In this step you have to scroll down using Volumebuttons and choose "wipe cache partition" by pushing the Powerkey.
Next, you will need to confirm the whole operation by choosing the "Yes" option.
When the Recovery menu will pop up again select "reboot system now" option.
Excellent! The wipe cache operation had been perfomed successfully.