#sd card speed

Author's Note: Article has been updated to include Application Performance Class under the Read/Write Speeds section as of February 23, 2018. Secure Digital (or SD for short) cards have been around since the early 2000s after three companies, Sandisk, Panasonic, and Toshiba all came together in 1999 to develop and market them as the industry standard. It's been almost twenty years since, and it's safe to say that their goal back in 1999 has been more than achieved, given the widespread use of SD cards. SD cards look like they're here to stay, and the least you can do to get the most out of the technology is to understand it so that you can make more educated buying decisions. Worry not though, as we're here to break it all down for you. Types of SD cards The simplest way to categorize SD cards into different types is by size, so that is where we will begin. There are three physical sizes of SD cards that are used nowadays: Standard Mini Micro Of the three, the mini SD size is the least common, as it's rare to see a device that uses it nowadays. On most, if not all cards, this is usually the biggest thing printed on the face of the card. Read more in our articles including "A Complete Guide to SD Cards" and "Moo Mini Cards: An Expensive Lesson in Proofreading".