The Roku 2 HD, Roku 2 XD and Roku 2 XS players all come with a microSD card slot to enable you to expand storage for channels and games. Once you fill internal storage on your Roku 2, your least recently used channels and games will be removed from your player as you install new channels and games. This leads to slower loading times for some channels and games because they will have to be downloaded when you use them again. Installing a microSD card helps ensure that all channels and games launch without requiring downloads.