The NM Card 100 from HP is a memory card in the special nano memory format developed by Huawei for its own smartphones. The card is slightly smaller than a typical microSD card, so you can insert it into the second nano SIM slot of your smartphone. This eliminates the need for a separate microSD slot. The memory card... provides you with an inexpensive external storage for your smartphone, so you no longer have a problem with a full internal memory. After inserting the NM card, you simply store your large files, such as numerous photos or videos, on the card.