image of Micro SD

mini Secure Digital format

Micro SD

The Secure Digital format includes four card families available in three different form factors. The four families are the original, Standard-Capacity (SDSC), the High-Capacity (SDHC), the eXtended-Capacity (SDXC), and the SDIO, which combines input/output functions with data storage.The three form factors are the original size, the “mini” size, and the “micro” size . There are many combinations of form factors and device families.