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.
Kingston microSDXC 64GB Class 10, V10, A1, UHS-I U1, R 100MB/s Memory Card, SD Adapter, 1 pc, Black
45 Review
💽 512GB Samsung Evo Plus Micro SDXC Memory Card
40 Review
Smartphone ZTE Blade V10 Vita 2/32 GB, Dual nano SIM, graphite black
50 Review
💾 Transcend 16GB SDHC Class 10 Flash Memory Card - High Speed Performance and Reliable Data Storage
36 Review