What is a true quality memory card ？
For Valued Customers:
About writing and reading speed ( USB 3.0 reader Test Result) :
8GB U1 Class10 speed == Above 10 MB/s = SDHC
16GB U1 Class10 speed == Max Read speed to 48 MB/s = SDHC
32GB U1 Class10 speed == Max Rread speed to 60 MB/s = SDHC
64GB U3 Class10 speed == Max Rread speed to 80 MB/s = SDXC
128GB U3 Class10 speed == Max Rread speed to 80 MB/s = SDXC
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.Use USB 3.0 card reader.
And the USB3.0 port for the computer.
(please dont use usb 2.0 card reader to test our card speed ,we have high quality usb 3.0 card reader meet this standard you can buy our card reader .)