SD Memory Card

The SD memory card is a memory format whose technical standards are developed by electronic industry giants such as Canon, HP, Motorola, Nokia and many others. It is a format that allows data to be stored securely, a feature valued by users who exchange information frequently. In order to keep up with demand and the continuously increasing speed and capacity requirements of electronic devices, the first generation SD memory card has been substantially improved upon.

The second generation cards of the SD format came in the form of Secure Digital High Capacity (SDHC) memory cards. The maximum capacity for these SDHC cards hit 32GB and maximum speeds were pegged at 10MB/s. Although these numbers were already quite impressive, the demand for even better products continued to rise.

Because of this, development on SDHC cards was taken a step further. The latest development was unveiled during the CES 2009 and is known as the Secure Digital Extended Capacity (SDXC) card. In this new format, storage capacity has a limit of 2048 GB while speed rates have a limit of 100MB/s. The standard file system for this latest SD memory card successor is the exFAT, a proprietary format of Microsoft. However, it is backward compatible; i.e., it can also support FAT32 or ext2.