Launch it using Alt + F2 , and typing gparted . In order to expand the 63GB partition, you must have unallocated space adjacent right to this partition.
In the toolbar underneath the Volumes section, click the menu button. Then click Resize Filesystem… or Resize… if there is no filesystem. A dialog will open ...
This tool allows you to resize partitions through a simple graphical interface. All you need to do is identify the partition you want to resize, right click ...