Your phone supports the use of an optional SD card (not included) to expand its storage capacity. It supports cards up to128 GB. Some cards may not operate properly with your phone.
SD Card Cautions
Data: Information stored on SD Card can become lost or changed accidently or 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 or remove Battery 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.