1. From the home screen, press the Options key.
   
2. Select System settings, then press the Center Nav key.
   
3. Select Storage, then press the Center Nav key.
   
4. The internal storage memory will be displayed beneath Internal storage.
   
5. The external storage memory will be displayed beneath SD card.
   
6. The Sonim XP5 is available with 4GB internal memory (1.8GB usable storage internal memory) with the option to add a MicroSD card up to 64GB (Sold separately).