How much difference in speed between SD cards twice as expensive as the others

The article introduce that there is a performance differences of the memory cards at different class or even same class by testing the performance of Class 10 products under USB 2.0 and USB 3.0 interfaces. Different classes are suitable for different consumers. Performance, capacity and price should be considered when choosing them. In addition, UHS-1 products can provide more performance for users with higher demand.

Memory card for this phone to backup disk

SIM Card brings network for phones to proceed calls, also it has limited space to load contacts. However, it is not the best choice for storing contents, then the bulk SD Card will be the replacement. In case, the missing happens to the SIM Card, all the data back up should be launched by wholesale SD Card.

Choose the Right Memory Cards for Your Camera — SD Cards

If you own a Point and Shoot variety of camera, there are 2 types of SanDisk memory cards to consider. Consider choosing the SanDisk Standard blue line of memory card, or the Ultra line of memory card. More details will be given later in the article to make the decision easier.
If you own a DSLR camera, consider choosing the Ultra card, the SanDisk Extreme card, or the Extreme Pro card for your camera. More details will be given later on each line of card.

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