I asked my tech savvy son how he would test an SD card. He said you can calculate the time, right? If you have a technical website, you can try splitting it in half. Instead, I decided to test it where it matters to me, on my Sony NEX-5TL compact interchangeable lens digital camera with a power zoom 16-50mm lens. If you have a good fast camera, you don't want it to get bogged down in a slow write speed card. This card is very fast with no lag in normal, continuous or video mode, and unlike another card I have in my Olympus E-PM2 interchangeable lens digital camera with a 14-42mm lens (black) (old model ) images are still available. So far it has proven to be a fast and reliable card. If I have an experience that changes my mind, I will update my review and star rating to reflect that. At the time of writing I am very happy with its performance and the 5 year warranty gives me confidence that it will continue to perform as expected or be cared for.
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