Insert the memory card (not included) into the slot. Make sure the gold contact area is facing downwards.
Do not insert or remove the memory card when the phone is on. Doing so may damage the memory card as well as your phone, and the data stored on the memory card may get corrupted.
On the Home screen, touch > Apps tab > Settings > Storage (DEVICE category) > Unmount SD card > OK.
Your memory card may already be formatted. If it isn't, you must format it before you can use it.
All files on your memory card are deleted when it is formatted.
On the Home screen, touch > Apps tab > Settings > Storage.
Touch Unmount SD card and touch OK to confirm it.
Touch Erase SD card and then Erase SD card one more time to confirm your choice.
If you have set a pattern lock, enter the pattern lock and touch Erase everything.
If there is content on your memory card, the folder structure may be different after formatting as all the files will be deleted.