Host devices that comply with newer versions of the specification provide backward compatibility and accept older SD cards, but this article explains several factors that can prevent the use of a newer SD card: There are many combinations of form factors and device families.Įlectrically passive adapters allow the use of a smaller card in a host device built to hold a larger card. The three form factors are the original size, the 'mini' size, and the 'micro' size (see illustration).
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 Secure Digital format includes four card families available in three different form factors. SD technologies have been implemented in more than 400 brands across dozens of product categories and more than 8,000 models. The Secure Digital standard is maintained by the SD Card Association (SDA). Secure Digital or ( SD) is a non-volatile memory card format for use in portable devices, such as mobile phones, digital cameras, GPS navigation devices, and tablet computers. Portable devices, including digital cameras and handheld computers SDSC (SD): 1 MB to 2 GB, some 4 GB available.
