I bought a few years ago very expensive for video shooting in HD50 / 50 mode. I did not check it on the card reader, believing the declared characteristics and began to shoot. The camcorder stopped after 1.5 seconds, after turning it on again it worked for 3 seconds and gave a card error. There was no such thing with any card from any other manufacturers, all of them have higher characteristics than those declared except for SanDisk.
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