I have only 5MB free space at my phone memory and other 20GB free space at mass memory. I have don't have any applications installed on the phone memory and I have no idea what I should remove to get more free space. I wanna download Nokia maps update which is 9MB big and I can't because I don't have enough free space. I have an older version which is also 9MB big, should I remove the old one? How can I delete all datas I don't need at my phone memory?