The SD Association has set the standards for the entire cell phone industry . There are over 1000 companies who've help to create the SD standards we know today. The SD memory card with removable memory is the most used. The SD is the card format developed by this organization and includes several types of cards including SDSC, Standard Capacity, SDHC, High Capacity, SDXC, Extended Capacity and DDIO, that combines input/output functions with data storage. Primarily in use today are SDHC and micro SDXC.
SDHC cards are the most popular cards on the market. Digital cameras, cell phones, mp3 players, and some computers use the SD format. Though they are best for less intensive use since computing with a SDHC card will lower the lifespan. With an Apple computer, users need to have a default partition set to GUID with the Mac OS Extended file format.
SDHC cards store and transfer information. Audio, video, photos all depend on this card to work. The greater the GB the faster it works. But you need to check for compatibility. SDHC come in a variety of sizes from 2GB and up to 32GB. If looking for a card you need to check compatibility not all devices will work with a 32GB, for example. To find this check the manufacturer's documentation. Only the most recent devices will be compatible but due to variations, it's important to check compatibility first.