How to Compare SD Memory Cards

Standard SD cards

Secure Digital (SD) memory cards are small, high-capacity storage cards used in digital cameras, cell phones, gaming devices, and MP3 players. SD cards offer a large amount of digital storage capacity in a small form factor that is lightweight and consumes little power. Available in three different sizes---SD, Mini SD, and Micro SD---the formats are backwards-compatible with each other and adapters can be purchased to use a Micro or Mini SD card in a standard SD device.

Things You'll Need

• Internet connection
• SD cards

Instructions

1. Compare the form factor of the SD cards. SD is the "standard" form factor. Mini SD cards are physically smaller than SD cards. Micro SD cards are the smallest memory cards available on the consumer market. Both Mini and Micro SD cards can be used in SD devices with an adapter.

2. Compare the capacity of the SD cards. Low capacity SD cards (64 megabytes to 1 gigabyte) are inexpensive and can be used in most electronic devices. High capacity SD cards (2 gigabytes to 8 gigabytes) are more expensive and cannot be used in all electronic devices. High capacity SD cards can hold more data and larger files than low capacity SD cards.

3. Consider the use of the SD card. If you are purchasing an SD card for your digital camera or MP3 player, choose a high-capacity card to increase the number of pictures and music files you can store. If you are purchasing the card for your phone or gaming device, you may not need a high-capacity card, but you might need a card with a smaller form factor.

4. Check your device for compatibility. Some electronic devices cannot use SD cards over a certain capacity due to hardware restrictions. Your electronic device might also require a certain size card, such as a Mini or Micro SD, that will affect your purchasing decision.

Tips & Warnings

• Purchase your SD card from a site that allows users to review the product. Read the reviews of other users to find out if the card has any known defects before making your purchase.

References

• Gizmodo: An Illustrated Guide to Every Stupid Memory Card You Need