Your phone supports the use of an optional microSD card (not included) to expand its storage capacity. It supports cards up to 2TB. Some cards may not operate properly with your phone.
microSD card Cautions
Data: Information stored on the microSD 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 while reading or writing data.
Battery Level: A low battery charge may prevent reading/writing to a microSD card.
Handling microSD card: Use/store microSD cards away from the reach of infants. May cause choking if swallowed.