The nabi 2S already comes with quite a sizeable amount of memory, 16 gigabytes, which is on the high end for a children’s tablet – or even most regular ones too. There is also nabi Cloud, which can be used to backup files.
However, being able to increase the amount of storage is always useful, especially as the quality and resolution of the integral cameras increases, which makes the pictures taken with them require more space to store as well. Downloaded content also increases the amount of memory that is needed.
The nabi 2S comes with a micro SD card slot. This will take memory cards up to 32GB in size, meaning that the nabi 2S has one of the highest amounts of storage currently available on a child’s tablet.