If you prefer to use a larger capacity card so that you can record additional videos, you need to make sure that the Micro SD Card is a minimum of Class 10. The maximum size of an SD Card which can be used is 32GB.
Using a lower class card may result in failed recordings as the card won't be able to save the content quickly enough.
The class type of a Micro SD card is shown as a number inside a circle. The example above is a Class 10 card.