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61 of 61 people found the following review helpful
Sony card is both slow and fast
on February 2, 2013
Many reviewers of the Sony UHS SD card had opposite evaluations of its speed; some considered it as extremely fast, while others considered it even slower than old SD cards. And both camps are correct. If you put this card into a USB 2 card reader, its write speed will be between 8 and 10 Mb/s, which is slower than even that of some class 6 cards, like SanDisk extreme III. The same might be true for cameras not supporting UHS bus interface. However, if you put it into one of the new cameras supporting UHS, you will see by the speed of clearing buffer that it supports 45 MB/s write speed and is much faster than a non UHS class 10 card, like Transcend 10 class. The same might be true for USB 3 card readers supporting UHS. Therefore, your experience is defined not only by the card, but also by the device in which you compare this card with others.