In case of running out of internal storage space, you will be able to increase storage by plug in external Macro SD card (only work for SDHC, not SDXC). The data migration program is located on Data Management and Data Migration. The program will help you to move big vehicle database into additional SD card, located at right hand side.

Left panel is internal storage, on the top, you will see Memory 14.53/21.65G means that you still have 14.53GB space available. 

Right panel is additional TF card storage. You will see TF card: 18.16G/28.82G means that you still have 18.16GB available.

If you run out of internal storage, you can check the item on left panel and move into right panel. If your right panel run out of space, you will need to get additional SD card and plug into SD card slot.