too slow 2

I am enttäucht from Sandisk.
Some time ago I had ordered a 8GB 60MB / s.
But it reached only 21 MB / s on average.
A demand for Sandisk brought the information that it was too slow and should be replaced.
The replacement card was not faster.
I had then completely returned.

Now I wanted to make a new attempt at the specified here 16GB variant.
Unfortunately, the result is the same.
H2wtest comes to 24.8 MB.
My 3 4GB Extreme IV 45MB / s create 30MB / s and my 8GB Extreme IV also.
Since the 60MB / s version should probably get over it.

I've tested all the cards to the Kingston Media Reader 19-in-1 USB2.0