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If you want to store anything on today's electronic devices, be it a camera, cell phone, MP3 player, or even some computers, you will need a memory card. There are many different formats of memory cards out there of varying storage sizes and speeds. If you are confused about which you need, read on.

As to the type of memory card you need, a lot of that will depend upon the device you are using. Most devices these days use SD (secure digital) cards or mini and micro SD cards. SD cards can be used in multiple devices and have a storage capacity of up to 32 GB. SD cards are the industry standard, and buying a device that uses them is essential for future compatibility.

Other cards include compact flash cards, which are an older format and larger in size than SD cards, memory sticks, a proprietary Sony technology, and xD cards. While each of these formats has pluses and minuses, they have largely become secondary players to SD cards. If you have a device that uses one of these types of cards, it might be time to upgrade to one that uses an SD card.

SD cards, while sharing a common format, are not all the same. They are rated by speed, with the designations being known as classes. A class 2 SD card can process 2 megabytes per second, a class 4 card 4 megabytes per second, and so forth. Class 10 cards are the fastest cards available at this time, although cards of speeds up to class 16 are in the works.

The speed of a card is an important consideration when determining which type of card to use for a given device. If you have a device like a camera that needs to be able to quickly send the image information to the camera so as to avoid lags between shots, the faster the card, the better. If speed is not an issue, cards of a lower class store data just as well as the faster cards and cost less.

It is also a good idea to get the largest capacity storage card you can afford instead of purchasing a bunch of smaller capacity cards. One large capacity card is more convenient and will help avoid running out of memory for large files, like HD video files. Fewer cards also mean fewer cards to lose.

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