are commonly used in digital cameras
, music players
, and even laptops. But not all SD cards are created equal — there are different speed classes, physical sizes, and capacities to consider. Different devices require different types of SD cards. Here are the differences you’ll need to keep in mind when picking out the right memory card for your device.
Manufacturers use “speed classes” to measure an SD card’s speed. There are four different speed classes — 10, 8, 4, and 2. 10 is the fastest, while 2 is the slowest. Class 2 is suitable for standard definition video recording, while classes 4 and 6 are suitable for high-definition video recording. Class 10 is suitable for “full HD video recording” and “HD still consecutive recording.” If you see no speed class symbol, you have a class 0 SD card. These cards were designed and produced before the speed class rating system was introduced. They may be slower than even a class 2 card.
Different devices use different sizes of SD cards. You’ll find standard-size CD cards, mini SD cards, and micro SD cards. These cards will only fit into matching slots. You can’t plug a micro SD memory card into a standard SD memory card slot — it won’t fit. However, you can purchase an adapter that allows you to plug a smaller SD memory card into a larger SD memory card’s form and fit it into the appropriate slot.
Like USB flash drives, hard drives, solid-state drives, and other storage media, different SD cards can have different amounts of storage. But the differences between SD card capacities don’t stop there. Standard SDSC (SD) cards are 1 MB to 2 GB in size, or perhaps 4 GB in size — although 4 GB is non-standard. The SDHC standard was created later, and allows cards 2 GB to 32 GB in size. SDXC is a more recent standard that allows cards 32 GB to 2 TB in size. You’ll need a device that supports SDHC or SDXC cards to use them.
It's quite simple: you just insert SD card into the designed slot of your smartphone and wait until the device recognizes the unit. It's advisable to insert and remove SD card with the smartphone turned off. Never try to force it: there's always a way to insert it in a smooth manner. Within the SD card, you're able to store data, images, applications and more.