Received item quickly, but unfortunately I did not get a chance to test them until it was too late to dispute. After testing, 7/10 were unusable (bad sectors) and one was a complete failure. Only two were usable!
The SD cards show high performance degration in arduino setting using the MISO MOSI CLK pins (generally used by arduino loggers). As a result 10 out of 10 cards are not suitable and seem not fit the specification -> lots of lost time.