Class 10 "holds" only in the NTFS file system, in FAT 32 the write speed does not reach more than 9 MB / s, which should not seem to be the case. W A file of about 3 GB was recorded through a card reader, the result is sad (less than 10 mb / s), it was not possible to exchange it for another, they say, this is all subjective. The card is working, but the fact that the speed does not hold is the influence of various factors. in NTFS gives out for 70 mb, it's a system glitch . caching tricks If you want to buy a card for a smartphone, don't be fooled by classiness, 4 (6) class is enough for your eyes. Kingston - no. Do not buy. I thought for a long time before buying, I bought it - I got screwed, I will drive with such . : as explained, this situation is possible due to the reader on the USB 2.0 interface, the person said that they say a similar card on USB 3.0 demonstrated the features of a class 10 card, i. E. for 10 MB write speed . all this is strange, is it really that all users who praise other card manufacturers have USB 3.0 readers, in general the situation is strange, I would advise you to pay attention not to Kingston
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