USB3.0 Speed :
16GB U1 Class 10 speed, Max Read speed to 48 MB/s
32GB U1 Class10 speed == Max Read speed to 60 MB/s
64GB U3 Class10 speed == Max Read speed to 80 MB/s
128GB U3 Class10 speed == Max Read speed to 80 MB/s
256GB U3 Class10 speed == Max Read speed to 80 MB/s
The above test data are based on the (ATTO Disk Benchmark) test results.
The actual test speed should be based on the level of the card reader or computer excuse.
Ask the buyer to test in the highest possible way.Usage USB 3.0 card reader.
And the USB3.0 port for the computer.
(our store's free card readers are all USB2.0 level, so they cannot meet this standard)
·This is calculation difference between manufacturer and our PC, please Google 'Memory card capacity' to get more information
8GB=Class 6 speed
16GB/32GB=Class 10 speed U1
Original high quality flash memory
Please use quaity card reader to verify all memory card by H2testw on PC
Please don't use cheap card reader to test memory card, speed of memory card will be reduced by low quality card reader
The most reliable software to verify memory card is H2testw
**memory card speed is greatly affected by card reader, adapter, USB port etc. Low quality device will 100% slow down card speed.
**Up to 40MB/s read speed; write speed lower. Based on internal testing; performance may be lower depending on host device, interface, usage conditions and other factors. 1MB=1,000,000 bytes.