If you’re looking for the fastest and most reliable SD memory card, then look no further, as we’ve tested all of the latest high speed UHS-I and UHS-II memory cards. Find out how these cards perform in our tests.

Here’s what 480GBs of storage looks like spread over 10 memory cards. Some of the cards have aged better than others, with some looking surprisingly aged despite being relatively new. Here is a list of all the cards we have tested, sorted with the quickest write speeds at the top. We used a USB3 UHS-II card reader for testing. We tested the read and write speeds using Crystal Mark x64, with 50MB sizes, as these are closest to photo file sizes, and ran each test three times.
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https://www.ephotozine.com/article/top-12-best-sd-memory-cards-tested-17827