Use a SD card (optional and sold separately) to store your photos, videos, and music. When you need to free up phone storage space, you can also move certain apps to the storage card, if the apps support this feature.
SD Card Cautions
Data: Information stored on the SD card can become lost or changed accidentally as a result of damage. It is recommended that you keep a separate copy of important data. Sprint is not responsible for damages from data that is lost or changed.
Reading/Writing Data: Never power off the phone while reading or writing data.
Battery Level: A low battery charge may prevent reading/writing to SD card.
Handling SD Card: Use/store SD cards away from the reach of infants. May cause choking if swallowed.