This memory stands and works in Lumia 1520. I will just describe the subjective sensations. I did not change the file system, i.e. It costs exFAT, the device saw without problems. I keep all capacious applications and a collection of music and video on it. I did not observe any failures in work, although 40.5 gigs are already crammed. The main place was taken by 2 FullHD films with a volume of about 9 and 13 gigs. There were no friezes during playback on a larger movie, but on a smaller one, but I attribute them to the fact that the file was compressed, errors may have occurred. I don’t write video from the camera, because I think that native memory is better to use in terms of speed, but maybe I’m wrong. But strictly speaking, I have not yet experienced difficulties from possible card lags, because either they are not there, or they are negligible. When I uploaded movies via USB 2.0, the speed was kept at 17-20 MB / s. I hope the information was helpful.
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