Calls and contacts
Apps and media
Cause 2 of 2: Unused apps take up too much memory
If you have many apps on your phone that you know longer use, the phone memory fills up quickly when e.g. taking pictures or downloading music.
Solution: Uninstall apps.
Find "Play Store"
Press Play Store.
Slide your finger right starting from the left side of the screen.
Press My apps & games.
Press the required app.
Return to the home screen
Press the Home key to return to the home screen.