InLine A connector USB 3.0 Extension Cable (1m) - unfortunately too slow

Now this is already the second failed attempt of mine, a USB 3.0 cable to find or extension with ordinary transmission rates. Unfortunately not met even this extension of my expectations. Bought together with a Kingston DTU 3.0 G3 32GB this extension. Without the extension to reach write speeds of 70-80 MB / s, with unfortunately only 25-30 MB / s. Will I return accordingly again. The search is therefore on, but now the price higher sector ...
Should'nt escape somebodies would like to advise just bring it.